学起plus离散数学作业答案 (2)

离散数学

学校: 无

问题 1: 1. Please stop ______. It cannot help the situation.

选项:

• A. to shout

• B. shouting

• C. to speak

• D. speaking

答案: shouting

问题 2: 2. Not until most of the people had left the airport ______ his sister was there.

选项:

• A. that he saw

• B. had he seen

• C. did he see

• D. that he had seen

答案: did he see

问题 3: 3. I prefer classic music ______ pop music.

选项:

• A. than

• B. on

• C. with

• D. to

答案: to

问题 4: 4. Please be serious. I am not_____. You should consider it carefully.

选项:

• A. sorting

• B. joking

• C. counting

• D. comparing

答案: joking

问题 5: 5. In the_____of the King, I arrest you.

选项:

• A. order

• B. name

• C. nod

• D. respect

答案: name

问题 6: 6. Our Lab was being ______ when we visited the university.

选项:

• A. rebuilt

• B. rebuild

• C. rebuilding

• D. to rebuild

答案: rebuilt

问题 7: 7. She went to Shanghai _____ way of Nanjing.

选项:

• A. by

• B. on

• C. in

• D. to

答案: 请关注公众号【青年搜题】查看答案

问题 8: 8. Silk ______ by Chinese for thousands of years now.

选项:

• A. has used

• B. has been used

• C. was used

• D. is used

答案: 请关注公众号【青年搜题】查看答案

问题 9: 9. He enjoys life _____ the “Queen Anne”.

选项:

• A. on a board

• B. on board

• C. in the board

• D. board

答案: 请关注公众号【青年搜题】查看答案

问题 10: 10. You study hard, and in_____you passed the test.

选项:

• A. result

• B. conclusion

• C. consequent

• D. consequence

答案: 请关注公众号【青年搜题】查看答案

问题 11: 11. I have not heard anything from him since his_____.

选项:

• A. departure

• B. fault

• C. foundation

• D. acceptance

答案: 请关注公众号【青年搜题】查看答案

问题 12: 12. Public schools in the United States are（）the control of the individual states

选项:

• A.

• B.

• C.

• D.

答案: 请关注公众号【青年搜题】查看答案

问题 13: 13. When carbon is added to iron in proper_____,the result is steel.

选项:

• A. rates

• B. thicknesses

• C. proportions

• D. densities

答案: 请关注公众号【青年搜题】查看答案

问题 14: 14. You ______ to lock the door at night.

选项:

• A. should

• B. ought

• C. must

• D. shall

答案: 请关注公众号【青年搜题】查看答案

问题 15: 15. Any student who ______ his homework is unlikely to pass the exam.

选项:

• A. reduces

• B. offends

• C. practices

• D. neglects

答案: 请关注公众号【青年搜题】查看答案

问题 16: 16. It is not that I do not like plays. The reason why I did not go to the theater last night was that I could not ______ the time.

选项:

• A. offer

• B. leave

• C. afford

• D. manage

答案: 请关注公众号【青年搜题】查看答案

问题 17: 17. We gave him _____ help we could.

选项:

• A. which

• B. what

• C. that

• D. this

答案: 请关注公众号【青年搜题】查看答案

问题 18: 18. Frank plays ______ Alex.

选项:

• A. a lot more better than

• B. much 九八五题库微信公众号搜题 more better than

• C. a lot better than

• D. much more well than

答案: 请关注公众号【青年搜题】查看答案

问题 19: 19. When they bought new suitcases, they had their_____printed on them in gold lettering.

选项:

• A. initials

• B. initial

• C. primal

• D. original

答案: 请关注公众号【青年搜题】查看答案

问题 20: 20. Excuse me would you please tell me _____

选项:

• A. when the sports meet is taken place

• B. when is the sports meet going to be held

• C. when is the sports meet to begin

• D. when the sports meet is to take place

答案: 请关注公众号【青年搜题】查看答案

问题 21: 21. The atmosphere is all the air（）the earth

选项:

• A.

• B.

• C.

• D.

答案: 请关注公众号【青年搜题】查看答案

问题 22: 22. Please look after my 云端课堂 parents during my ______.

选项:

• A. absence

• B. presence

• C. visit

• D. time

答案: 请关注公众号【青年搜题】查看答案

问题 23: 23. What caused the accident and who was responsible for it_____a mystery(谜)to us.

选项:

• A. remains

• B. remain

• C. is

• D. look like

答案: 请关注公众号【青年搜题】查看答案

问题 24: 24. It is not_____for me to return all the books to the library now because I still need some of them for my research.

选项:

• A. continuous

• B. difficult

• C. convenient

• D. sufficient

答案: 请关注公众号【青年搜题】查看答案

问题 25: 25. She_____her medicine with the help of some water mixed with sugar.

选项:

• A. bite

• B. swallowed

• C. chewed

• D. nibbled

答案: 请关注公 超星答案 众号【青年搜题】查看答案

问题 26: 26. Some pop singers have much influence ______ the young people today.

选项:

• A. to

• B. for

• C. onto

• D. on

答案: 请关注公众号【青年搜题】查看答案

问题 27: 27. It was three years ago _____ Mr. Smith came to Shanghai.

选项:

• A. when

• B. since

• C. that

• D. until

答案: 请关注公众号【青年搜题】查看答案

问题 28: 28. Let’s finish our homework in a few seconds; it’s time we ______.

选项:

• A. played football

• B. will play football

• C. play football

• D. are playing football

答案: 请关注公众号【青年搜题】查看答案

问题 29: 29. A lecture hall is ______ where students attend lectures.

选项:

• A. there

• B. which

• C. one

• D. that

答 渝粤搜题APP下载安装 案: 请关注公众号【青年搜题】查看答案

问题 30: 30. Hardly _____ the railway station when the train started.

选项:

• A. did reach

• B. had I reached

• C. I reached

• D. I had reached

答案: 请关注公众号【青年搜题】查看答案

问题 31: 31. He ______ himself quickly to the new situation of his work.

选项:

• A. changed

• B. altered

• C. adjusted

• D. varied

答案: 请关注公众号【青年搜题】查看答案

问题 32: 32. Where is your father? --- Oh, _____ .

选项:

• A. here comes he

• B. here does he come

• C. he here comes

• D. here he comes

答案: 请关注公众号【青年搜题】查看答案

问题 33: 33. You should make ______ your house or flat is secure.

选项:

• A. sure

• B. certain

• C. understanding

• D. knowledge

答案: 请关注公众号【青年搜题】查看答案

问题 34: 34. _____what age do children begin to go to school?

选项:

• A. Of

• B. From

• C. For

• D. At

答案: 请关注公众号【青年搜题】查看答案

问题 35: 35. He rather than Li Ying and Wang Ping_____praised by the teacher.

选项:

• A. are

• B. is

• C. were

• D. was

答案: 请关注公众号【青年搜题】查看答案

问题 36: 36. He has_____ little education_____he is unable to find a job.

选项:

• A. such,that

• B. so,and

• C. so,that

• D. such,and

答案: 请关注公众号【青年搜题】查看答案

问题 37: 37. The watch he _____ went wrong again.

选项:

• A. had to be mended

• B. has mended

• C. had had mended

• D. had been mended

答案: 请关注公众号【青年搜题】查看答案

问题 38: 38. Some of the citizens have been ______ medals for bravery.

选项:

• A. given

• B. offered

• C. awarded

• D. paid

答案: 请关注公众号【青年搜题】查看答案

问题 39: 39. He spoke so quickly that I didn’t ______ what he said.

选项:

• A. make for

• B. make sure

• C. make over

• D. make out

答案: 请关注公众号【青年搜题】查看答案

问题 40: 40. The treatment will continue until the patient reaches the point _____ he can walk correctly and safely.

选项:

• A. when

• B. where

• C. which

• D. how

答案: 请关注公众号【青年搜题】查看答案

问题 41: 41. The young man insisted that he _____ nothing wrong and _____ free.

选项:

• A. did,set

• B. had done,should be set

• C. should do,be set

• D. had done,must be set

答案: 请关注公众号【青年搜题】查看答案

问题 42: 42. You may use my room as you like, _____ you clean it up afterwards.

选项:

• A. so far as

• B. as well as

• C. as soon as

• D. so long as

答案: 请关注公众号【青年搜题】查看答案

问题 43: 43. He treated me as though _____ his own son.

选项:

• A. I am

• B. I would be

• C. I was

• D. I were

答案: 请关注公众号【青年搜题】查看答案

问题 44: 44. Some of the older villagers prefer_____tobacco rather than to smoke it.

选项:

• A. to chew

• B. chewed

• C. chewing

• D. chew

答案: 请关注公众号【青年搜题】查看答案

问题 45: 45. My parents used _____ they had to get a new car for me.

选项:

• A. which

• B. that

• C. what

• D. all what

答案: 请关注公众号【青年搜题】查看答案

问题 46: 46. ______ the advice of his friends, he would not have suffered such a heavy loss in his business.

选项:

• A. If he took

• B. If he should take

• C. Were he to take

• D. Had he taken

答案: 请关注公众号【青年搜题】查看答案

问题 47: 47. He is a kind-hearted and ______ gentleman.

选项:

• A. respective

• B. respectable

• C. respected

• D. respectful

答案: 请关注公众号【青年搜题】查看答案

问题 48: 48. The bus _____start;I don’t know what to do with it.

选项:

• A. can’t

• B. won’t

• C. shan’t

• D. may not

答案: 请关注公众号【青年搜题】查看答案

问题 49: 49. Scientists are convinced_____the positive effect of laughter_____physical and mental health.

选项:

• A. of, at

• B. by, in

• C. of, on

• D. on, at

答案: 请关注公众号【青年搜题】查看答案

问题 50: 50. This period of （）from teaching is called a "sabbatical leave".

选项:

• A.

• B.

• C.

• D.

答案: 请关注公众号【青年搜题】查看答案

问题 51: 51. I ______ you that I had no intention of offending you.

选项:

• A. convince

• B. persuade

• C. guarantee

• D. assure

答案: 请关注公众号【青年搜题】查看答案

问题 52: 52. What did people say_____ me?

选项:

• A. with

• B. by

• C. forward

• D. of

答案: 请关注公众号【青年搜题】查看答案

问题 53: 53. Only after his death _____ considered correct.

选项:

• A. was his theory

• B. his theory was

• C. did his theory

• D. had his theory

答案: 请关注公众号【青年搜题】查看答案

问题 54: 54. I didn’t see your sister at the meeting. If she _____, she would have met my brother.

选项:

• A. has come

• B. did come

• C. came

• D. had come

答案: 请关注公众号【青年搜题】查看答案

问题 55: 55. _____ , I would have phoned you.

选项:

• A. If I knew it

• B. Had I known it

• C. If I know it

• D. Did I know it

答案: 请关注公众号【青年搜题】查看答案

问题 56: 56. All I’m trying to do is to ______ why your conclusion has not improved.

选项:

• A. look for

• B. find out

• C. search for

• D. get in

答案: 请关注公众号【青年搜题】查看答案

问题 57: 57. If they have（）to the system, they can even complete the form electronically through the Internet.

选项:

• A.

• B.

• C.

• D.

答案: 请关注公众号【青年搜题】查看答案

问题 58: 58. Setting fire to the public buildings _____ highly dangerous and forbidden by law.

选项:

• A. are

• B. is

• C. has

• D. were

答案: 请关注公众号【青年搜题】查看答案

问题 59: 59. I can’t find Mr Wang anywhere in the office building.Where_____he have gone?

选项:

• A. may

• B. can

• C. must

• D. should

答案: 请关注公众号【青年搜题】查看答案

问题 60: 60. Look ,it_____be Li Ping.－No,it_____be him.He’s gone abroad.

选项:

• A. may,mustn’t

• B. must,may

• C. must,can’t

• D. can,may not

答案: 请关注公众号【青年搜题】查看答案

问题 61: 61. Have you visited the bridge _____ the workers have just finished
building _____?

选项:

• A. /,/

• B. where,it

• C. where,/

• D. /,it

答案: 请关注公众号【青年搜题】查看答案

问题 62: 62. _____ in the river yesterday, the boy _____ .

选项:

• A. Were Mr Black not,would not be drowned

• B. Were Mr Black,would be drowned

• C. Had Mr Black not been,would have been drowned

• D. Hadn't Mr Black been,would have drowned

答案: 请关注公众号【青年搜题】查看答案

问题 63: 63. After they____down in the village, they began to live a more peaceful life.

选项:

• A. arrived

• B. got

• C. stayed

• D. settled

答案: 请关注公众号【青年搜题】查看答案

问题 64: 64. The president claimed the terrorists should be held responsible ______ the explosions that happened last month in London.

选项:

• A. for

• B. on

• C. at

• D. about

答案: 请关注公众号【青年搜题】查看答案

问题 65: 65. She is_____of his innocence.

选项:

• A. believed

• B. trusted

• C. persuaded

• D. convinced

答案: 请关注公众号【青年搜题】查看答案

问题 66: 66. He was told that it would be at least three more months_____he could recover and return to work.

选项:

• A. when

• B. before

• C. since

• D. that

答案: 请关注公众号【青年搜题】查看答案

问题 67: 67. As a driver, Mike had to take his（）of responsibility for the accident.

选项:

• A.

• B.

• C.

• D.

答案: 请关注公众号【青年搜题】查看答案

问题 68: 68. That is your school, _____?

选项:

• A. isn’t that

• B. mustn’t it

• C. isn’t it

• D. won’t it

答案: 请关注公众号【青年搜题】查看答案

问题 69: 69. —Will you join us in the game?
—Thank you,_____

选项:

• A. but why not?

• B. but I’d rather not

• C. and I won’t

• D. and I’ll join.

答案: 请关注公众号【青年搜题】查看答案

问题 70: 70. I was so_____in today’s history lesson. I didn’t understand a thing.

选项:

• A. amazed

• B. neglected

• C. confused

• D. amused

答案: 请关注公众号【青年搜题】查看答案

问题 71: 71. Why didn’t you try your best to get on the bus?--- I tried to, but _____ I could it started moving.

选项:

• A. until

• B. when

• C. before

• D. after

答案: 请关注公众号【青年搜题】查看答案

问题 72: 72. Many boys enjoy football, basketball or baseball

选项:

• A.

• B.

• C.

• D.

答案: 请关注公众号【青年搜题】查看答案

问题 73: 73. My family _____ not large, but my family _____ all music lovers.

选项:

• A. is,are

• B. are,is

• C. is,is

• D. are,are

答案: 请关注公众号【青年搜题】查看答案

问题 74: 74. A survey was carried out on the death rate of newly born babies in
that region, _____ were surprising.

选项:

• A. the results of it

• B. as results

• C. the results of which

• D. which results

答案: 请关注公众号【青年搜题】查看答案

问题 75: 75. It was cold yesterday.--- _____ . Which of the following is wrong?

选项:

• A. So it was

• B. So is it today

• C. So was it the day before

• D. So it did

答案: 请关注公众号【青年搜题】查看答案

问题 76: 76. We are told that it is ______ we are born that decides our nationality.

选项:

• A. somewhere

• B. the country

• C. anywhere

• D. where

答案: 请关注公众号【青年搜题】查看答案

问题 77: 77. They were_____because the thieves had stolen all their money.

选项:

• A. difficult

• B. in deep water

• C. absurd

• D. at wit's end

答案: 请关注公众号【青年搜题】查看答案

问题 78: 78. The soldier was wounded,_____he pushed on.

选项:

• A. for

• B. and

• C. so

• D. yet

答案: 请关注公众号【青年搜题】查看答案

问题 79: 79. Few sabbatical leaves are interesting enough to（）, in national newspapers and magazines.

选项:

• A.

• B.

• C.

• D.

答案: 请关注公众号【青年搜题】查看答案

问题 80: 80. _____ we go swimming every day _____ us a lot of good.

选项:

• A. If,do

• B. That,do

• C. If,does

• D. That,does

答案: 请关注公众号【青年搜题】查看答案

问题 81: 81. The reason I didn't attend the lecture was simply（）I got a bad cold that day.

选项:

• A.

• B.

• C.

• D.

答案: 请关注公众号【青年搜题】查看答案

问题 82: 82. Before joining the army, he spent a lot of time in the village ______ he belonged.

选项:

• A. which

• B. to which

• C. to where

• D. at which

答案: 请关注公众号【青年搜题】查看答案

问题 83: 83. He is_____man whom I have been looking for.

选项:

• A. the

• B. a

• C. an

• D. x

答案: 请关注公众号【青年搜题】查看答案

问题 84: 84. Do you know who are ______ the survey?

选项:

• A. discussing

• B. taking

• C. giving

• D. conducting

答案: 请关注公众号【青年搜题】查看答案

问题 85: 85. Many a girl wants to become _____.

选项:

• A. some secretary

• B. a secretary

• C. secretary

• D. secretaries

答案: 请关注公众号【青年搜题】查看答案

问题 86: 86. It is assumed that students at an intermediate level will have a good ______ of the basic structures and vocabulary of English.

选项:

• A. command

• B. commanding

• C. to command

• D. commanded

答案: 请关注公众号【青年搜题】查看答案

问题 87: 87. I shall take you back to France _____ you are well enough to travel.

选项:

• A. presently

• B. quickly

• C. directly

• D. at once

答案: 请关注公众号【青年搜题】查看答案

问题 88: 88. I’ve worked with child before, so I know what _____ in my new job.

选项:

• A. expected

• B. to expect

• C. to be expecting

• D. expect

答案: 请关注公众号【青年搜题】查看答案

问题 89: 89. If you want to learn something, you had better pay ______ in class.

选项:

• A. care

• B. respect

• C. attention

• D. notion

答案: 请关注公众号【青年搜题】查看答案

问题 90: 90. He left his house at my_____during my holidays.

选项:

• A. disposal

• B. control

• C. use

• D. dispose

答案: 请关注公众号【青年搜题】查看答案

问题 91: 91. It is well-known _____ all of us that Taiwan belongs_____ China.

选项:

• A. by,to

• B. to,to

• C. for,to

• D. to,of

答案: 请关注公众号【青年搜题】查看答案

问题 92: 92. For the_____of your health, you should give up smoking.

选项:

• A. benefit

• B. profit

• C. result

• D. sake

答案: 请关注公众号【青年搜题】查看答案

问题 93: 93. Do you know _____?

选项:

• A. how many populations there are in the world

• B. how much population there is in the world

• C. how many the population of the world is

• D. what the population of the world is

答案: 请关注公众号【青年搜题】查看答案

问题 94: 94. I cannot tell the ______ difference between the twins.

选项:

• A. slight

• B. single

• C. simple

• D. slender

答案: 请关注公众号【青年搜题】查看答案

问题 95: 95. If the man ______ succeed, he must work as hard as he can.

选项:

• A. will

• B. is to

• C. is going to

• D. should

答案: 请关注公众号【青年搜题】查看答案

问题 96: 96. We have tried all the_____, but none works.

选项:

• A. cure

• B. cares

• C. remedies

• D. aftercares

答案: 请关注公众号【青年搜题】查看答案

问题 97: 97. Three people, ______, were injured in the accident.

选项:

• A. Included a child

• B. include a child

• C. including a child

• D. includes a child

答案: 请关注公众号【青年搜题】查看答案

问题 98: 98. Yesterday Mr. Smith gave a vivid ______ of his recent visit to China.

选项:

• A. dialogue

• B. idea

• C. tale

• D. account

答案: 请关注公众号【青年搜题】查看答案

问题 99: 99. My aunt came back_____ three days.

选项:

• A. after

• B. in

• C. around

• D. about

答案: 请关注公众号【青年搜题】查看答案

问题 100: 100. We do not permit ______ in the office. So we do not permit him here.

选项:

• A. to smoke,to smoke

• B. smoking,to smoke

• C. smoking,smoking

• D. to smoke,smoking

答案: 请关注公众号【青年搜题】查看答案

问题 101: 101. ______ he studies hard, he will never pass the exam.

选项:

• A. Unless

• B. If

• C. Until

• D. When

答案: 请关注公众号【青年搜题】查看答案

问题 102: 102. How the fire in the dance hall started ______ a mystery.

选项:

• A. to remain

• B. remains

• C. remain

• D. is remaining

答案: 请关注公众号【青年搜题】查看答案

问题 103: 103. We cannot judge a person simply on the ______ of this education.

选项:

• A. condition

• B. basis

• C. principle

• D. theory

答案: 请关注公众号【青年搜题】查看答案

问题 104: 104. In crowded places like a 云上河开考试题库免费 irports and railway stations, you_____take care of your luggage.

选项:

• A. can

• B. may

• C. must

• D. will

答案: 请关注公众号【青年搜题】查看答案

问题 105: 105. Their friendship dates_____to college days.

选项:

• A. from

• B. back

• C. according

• D. till

答案: 请关注公众号【青年搜题】查看答案

问题 106: 106. Please leave the key under the door ______ you go out.

选项:

• A. in case

• B. in the case

• C. in case of

• D. in the case of

答案: 请关注公众号【青年搜题】查看答案

问题 107: 107. _____ much harder work, the volunteers were able to place the raging forest fire_____.

选项:

• A. By the means of,under the control

• B. By means of,under control

• C. By means of,under a control

• D. By a means,under control

答案: 请关注公众号【青年搜题】查看答案

问题 108: 108. If we ______ the plan you suggest, we are more likely to be successful.

选项:

• A. elect

• B. command

• C. decide

• D. adopt

答案: 请关注公众号【青年搜题】查看答案

问题 109: 109. They handed in their paper ______.

选项:

• A. in line

• B. by turn

• C. at turn

• D. in turn

答案: 请关注公众号【青年搜题】查看答案

问题 110: 110. Charlie Chaplin, _____ was born in 1889, is one of the greatest
actors _____ the history of the cinema.

选项:

• A. that,in

• B. who,in

• C. that,on

• D. who,on

答案: 请关注公众号【青年搜题】查看答案

问题 111: 111. The only means to achieve success _____ to appeal to arms.

选项:

• A. is

• B. are

• C. were

• D. have

答案: 请关注公众号【青年搜题】查看答案

问题 112: 112. The research is so designed that once _____ nothing can be done to change it.

选项:

• A. begins

• B. having begun

• C. beginning

• D. begun

答案: 请关注公众号【青年搜题】查看答案

问题 113: 113. Every boy and every girl _____ a new book.

选项:

• A. are given

• B. is given

• C. has given

• D. have given

答案: 请关注公众号【青年搜题】查看答案

问题 114: 114. Hardly ______ home when it began to rain.

选项:

• A. had I got

• B. I had got

• C. had I arrived in

• D. I had arrived at

答案: 请关注公众号【青年搜题】查看答案

问题 115: 115. By the time he retires John_____here for 30 years.

选项:

• A. has taught

• B. has been teaching

• C. will have be 学起plus马原答案2025 en teaching

• D. has been taught

答案: 请关注公众号【青年搜题】查看答案

问题 116: 116. Allow me one minute（）to change my clothes.

选项:

• A.

• B.

• C.

• D.

答案: 请关注公众号【青年搜题】查看答案

问题 117: 117. Everything ______ if Albert hadn’t called the fire brigade.

选项:

• A. will be destroyed

• B. will have been destroyed

• C. would be destroyed

• D. would have been destroyed

答案: 请关注公众号【青年搜题】查看答案

问题 118: 118. If you made a decision, please stick ______ what you want.

选项:

• A. to

• B. up

• C. of

• D. for

答案: 请关注公众号【青年搜题】查看答案

问题 119: 119. For days at a time the driver's life （）sitting, eating and sleeping.

选项:

• A.

• B.

• C.

• D.

答案: 请关注公众号【青年搜题】查看答案

问题 120: 120. I must congratulate you_____the excellent design of the new bridge.

选项:

• A. with

• B. of

• C. at

• D. on

答案: 请关注公众号【青年搜题】查看答案

问题 121: 121. John fell asleep ______ he was listening to the music.

选项:

• A. after

• B. before

• C. while

• D. as soon as

答案: 请关注公众号【青年搜题】查看答案

问题 122: 122. Would you go and see _____ outside?

选项:

• A. what to take place

• B. what Tom has happened

• C. what is happening

• D. what the matter had been

答案: 请关注公众号【青年搜题】查看答案

问题 123: 123. The shoes _____ mine.
This pair of shoes _____ my brother’s.

选项:

• A. are,is

• B. is,is

• C. are,are

• D. is,are

答案: 请关注公众号【青年搜题】查看答案

问题 124: 124. It was_____his mother came in_____to prepare his lessons.

选项:

• A. not until,did the boy begin

• B. until,that the boy began

• C. until,did the boy begin

• D. not until,that the boy began

答案: 请关注公众号【青年搜题】查看答案

问题 125: 125. You should be able to ______ right from wrong.

选项:

• A. perceive

• B. distinguish

• C. sight

• D. observe

答案: 请关注公众号【青年搜题】查看答案

问题 126: 126. Suddenly, a tall man driving a golden carriage _____ the girl and took her away, _____ into the woods.

选项:

• A. seizing, disappeared

• B. seized, disappeared

• C. seizing, disappearing

• D. seized, disappearing

答案: 请关注公众号【青年搜题】查看答案

问题 127: 127. Buildings should be specially designed so they can be easily used by_____.

选项:

• A. disabled

• B. the disabled

• C. the poor

• D. poor

答案: 请关注公众号【青年搜题】查看答案

问题 128: 128. If you suspect that the illness might be serious, you should not ______ going to the doctor.

选项:

• A. pick out

• B. make out

• C. give off

• D. put off

答案: 请关注公众号【青年搜题】查看答案

问题 129: 129. This unusual sabbatical leave was conducted（）great secrecy.

选项:

• A.

• B.

• C.

• D.

答案: 请关注公众号【青年搜题】查看答案

问题 130: 130. —It was really very kind of you to give me a lift home.
—Oh, don’t mention it. I_____past your house anyway.

选项:

• A. was coming

• B. will come

• C. had come

• D. have come

答案: 请关注公众号【青年搜题】查看答案

问题 131: 131. This is the only work _____ at the moment.

选项:

• A. which I can do

• B. that I can do it

• C. I can do

• D. what I can do

答案: 请关注公众号【青年搜题】查看答案

问题 132: 132. All_____not gold that glitters.

选项:

• A. is

• B. are

• C. was

• D. were

答案: 请关注公众号【青年搜题】查看答案

问题 133: 133. Do you know the student _____?

选项:

• A. whom I often talk

• B. with who I often talk

• C. I often talk with

• D. that I often talk

答案: 请关注公众号【青年搜题】查看答案

问题 134: 134. She asked me what I_____all these years.

选项:

• A. have been doing

• B. had done

• C. have done

• D. had been doing

答案: 请关注公众号【青年搜题】查看答案

问题 135: 135. John, ______ the bet, had to pay for the dinner.

选项:

• A. lost

• B. having lost

• C. losing

• D. having loss

答案: 请关注公众号【青年搜题】查看答案

问题 136: 136. —It’s a long time since I saw my sister.
—_____ her this weekend?

选项:

• A. Why not visit

• B. Why not to visit

• C. Why not visiting

• D. Why don’t visit

答案: 请关注公众号【青年搜题】查看答案

问题 137: 137. If you_____quiet ,I’ll tell you what happened.

选项:

• A. be

• B. will be

• C. are

• D. are to be

答案: 请关注公众号【青年搜题】查看答案

问题 138: 138. More and more people in China now ______ to work regularly.

选项:

• A. drive

• B. drives

• C. drove

• D. have driven

答案: 请关注公众号【青年搜题】查看答案

问题 139: 139. We are still one mile_____ the destination (目的地).

选项:

• A. in need

• B. out of

• C. outside

• D. short of

答案: 请关注公众号【青年搜题】查看答案

问题 140: 140. Victor apologized for _____ to inform me of the change in the plan.

选项:

• A. his being not able

• B. him not to be able

• C. his not being able

• D. him to be not able

答案: 请关注公众号【青年搜题】查看答案

问题 141: 141. There isn’t going to be a volleyball match next week, _____?

选项:

• A. is it

• B. isn’t it

• C. is there

• D. isn’t there

答案: 请关注公众号【青年搜题】查看答案

问题 142: 142. _____ that he found it difficult to stop at the red light.

选项:

• A. So fast he was driving

• B. So fast he drove

• C. So fast was he driving

• D. So fast drive he

答案: 请关注公众号【青年搜题】查看答案

问题 143: 143. _____of the noise, he shut all the windows of his room.

选项:

• A. Tire

• B. Tired

• C. Tiring

• D. Be tired

答案: 请关注公众号【青年搜题】查看答案

问题 144: 144. _____by a greater demand of vegetables, farmers have built more green houses.

选项:

• A. Driven

• B. Being driven

• C. To drive

• D. Having driven

答案: 请关注公众号【青年搜题】查看答案

问题 145: 145. All the memories of his childhood had_____from his mind by the time he was 65.

选项:

• A. faded

• B. illustrated

• C. confined

• D. concerned

答案: 请关注公众号【青年搜题】查看答案

问题 146: 146. I’m old enough to wash ______ clo 学起Plus期末试题及答案 thes by myself. You can just wash ______.

选项:

• A. my,your

• B. mine,yours

• C. my,yours

• D. your,my

答案: 请关注公众号【青年搜题】查看答案

问题 147: 147. I’m going to the supermarket this afternoon. Do you have anything _____ ?

选项:

• A. to be buying

• B. to buy

• C. for buying

• D. bought

答案: 请关注公众号【青年搜题】查看答案

问题 148: 148. It_____we had stayed together for a couple of weeks_____I found we had a lot in common.

选项:

• A. was until,when

• B. was until,that

• C. wasn’t until,when

• D. wasn’t until,that

答案: 请关注公众号【青年搜题】查看答案

问题 149: 149. No one can stop us from going there, _____?

选项:

• A. can’t it

• B. can they

• C. can’t they

• D. can one

答案: 请关注公众号【青年搜题】查看答案

问题 150: 150. They were asked to avoid ______ any water which had not been boiled.

选项:

• A. drinking

• B. to drink

• C. having

• D. not to be drunk

答案: 请关注公众号【青年搜题】查看答案

问题 151: 151. ______ they are doing has never been done before.

选项:

• A. That

• B. What

• C. Why

• D. Whether

答案: 请关注公众号【青年搜题】查看答案

问题 152: 152. He has made a lot of films, but_____good ones.

选项:

• A. any

• B. some

• C. few

• D. many

答案: 请关注公众号【青年搜题】查看答案

问题 153: 153. One of the benefits of the new model is that it is easier ______ than the old one.

选项:

• A. operating

• B. to be operated

• C. to operate

• D. operated

答案: 请关注公众号【青年搜题】查看答案

问题 154: 154. In this factory each worker must receive a ______ training course.

选项:

• A. two-month

• B. two months

• C. two-months

• D. two-months’

答案: 请关注公众号【青年搜题】查看答案

问题 155: 155. The_____at the military academy is so rigid that students can hardly bear it.

选项:

• A. convention

• B. confinement

• C. principle

• D. discipline

答案: 请关注公众号【青年搜题】查看答案

问题 156: 156. As the Summer Holiday is coming, students_____for home.

选项:

• A. set off

• B. go back

• C. prepare

• D. ready

答案: 请关注公众号【青年搜题】查看答案

问题 157: 157. _____ such heavy pollution already, it may now be too late to clean up the river.

选项:

• A. Having suffered

• B. Suffering

• C. To suffer

• D. Suffered

答案: 请关注公众号【青年搜题】查看答案

问题 158: 158. Had you listened to the doctor, you _____ all right now.

选项:

• A. are

• B. were

• C. would be

• D. would have been

答案: 请关注公众号【青年搜题】查看答案

问题 159: 159. Before I got to the cinema, the film ______.

选项:

• A. Had begun

• B. has begun

• C. is begun

• D. was beginning

答案: 请关注公众号【青年搜题】查看答案

问题 160: 160. The cattle_____still grazing in the fields.

选项:

• A. was

• B. keeps

• C. were

• D. won’t

答案: 请关注公众号【青年搜题】查看答案

问题 161: 161. She dislikes this skirt, _____?

选项:

• A. doesn’t she

• B. does she

• C. isn’t she

• D. is she

答案: 请关注公众号【青年搜题】查看答案

问题 162: 162. It is hoped that the weather will ______ warm for three more days.

选项:

• A. last

• B. go on

• C. keep on

• D. stay

答案: 请关注公众号【青年搜题】查看答案

问题 163: 163. It’s quite impossible that it will rain tomorrow. But if it _____, I would still go to the park.

选项:

• A. should rain

• B. would rain

• C. rains

• D. had rained

答案: 请关注公众号【青年搜题】查看答案

问题 164: 164. Last week I bought a flat ______ biggest room faced south.

选项:

• A. that

• B. whose

• C. which

• D. where

答案: 请关注公众号【青年搜题】查看答案

问题 165: 165. I will never forget the time ______ we both stayed in the little village.

选项:

• A. when

• B. during which

• C. in which

• D. which

答案: 请关注公众号【青年搜题】查看答案

问题 166: 166. Let’s talk all this over again _____ we make a final decision.

选项:

• A. after

• B. while

• C. before

• D. when

答案: 请关注公众号【青年搜题】查看答案

问题 167: 167. The act of speaking will also help to improve listening comprehension ______.

选项:

• A. to some way

• B. in the way

• C. to some extent

• D. in the extent

答案: 请关注公众号【青年搜题】查看答案

问题 168: 168. There was no point（）him to come early since everything was ready.

选项:

• A.

• B.

• C.

• D.

答案: 请关注公众号【青年搜题】查看答案

问题 169: 169. The escaped murderer is still at_____.

选项:

• A. home

• B. large

• C. escape

• D. away

答案: 请关注公众号【青年搜题】查看答案

问题 170: 170. _____ I be free tomorrow, I could go with you.

选项:

• A. Could

• B. Should

• C. Might

• D. Must

答案: 请关注公众号【青年搜题】查看答案

问题 171: 171. The workers are busy ______ models for the exhibition.

选项:

• A. making

• B. being making

• C. to make

• D. with making

答案: 请关注公众号【青年搜题】查看答案

问题 172: 172. Once you’re into basketball, you’ll find ______ great fun to play as a way to relax.

选项:

• A. it

• B. that

• C. this

• D. what

答案: 请关注公众号【青年搜题】查看答案

问题 173: 173. It’s so nice to hear from her again._____,we last met more than thirty years ago.

选项:

• A. What's word

• B. That's to say

• C. In other words

• D. Believe it or not

答案: 请关注公众号【青年搜题】查看答案

问题 174: 174. No sooner _____ asleep than she heard a knock at the door.

选项:

• A. she had fallen

• B. had she fallen

• C. she had fell

• D. had she fell

答案: 请关注公众号【青年搜题】查看答案

问题 175: 175. I don’t mind her criticizing me, but_____is how she does it that I object to.

选项:

• A. it

• B. that

• C. which

• D. this

答案: 请关注公众号【青年搜题】查看答案

问题 176: 176. We failed in our ______ to climb the mountain.

选项:

• A. trial

• B. contempt

• C. desire

• D. attempt

答案: 请关注公众号【青年搜题】查看答案

问题 177: 177. Now I can manage to make myself ______ sufficiently in your language.

选项:

• A. understood

• B. being understood

• C. to be understood

• D. to understand

答案: 请关注公众号【青年搜题】查看答案

问题 178: 178. He was ______ the preparation of an international conference when I arrived in Beijing.

选项:

• A. engaged to

• B. engaged for

• C. engaged on

• D. engaged in

答案: 请关注公众号【青年搜题】查看答案

问题 179: 179. Mr. Smith wanted to buy the house and he told me that _____ the house cost, it would be _____ it.

选项:

• A. however,worth

• B. how much,worth

• C. whatever,worth

• D. what,worthy

答案: 请关注公众号【青年搜题】查看答案

问题 180: 180. The excited girl quickly_____down.

选项:

• A. calmed

• B. come

• C. run

• D. went

答案: 请关注公众号【青年搜题】查看答案

问题 181: 181. We shouldn’t spent our money testing so many people, most of_____are healthy.

选项:

• A. that

• B. which

• C. what

• D. whom

答案: 请关注公众号【青年搜题】查看答案

问题 182: 182. They failed to pass the exam last time. I regretted ______ them.

选项:

• A. being unable to help

• B. to be not able to

• C. being not able to help

• D. not be able to help

答案: 请关注公众号【青年搜题】查看答案

问题 183: 183. Each of us _____ a dictionary of this kind.
We each _____ a dictionary of this kind.

选项:

• A. has,have

• B. have,have

• C. has,has

• D. have,has

答案: 请关注公众号【青年搜题】查看答案

问题 184: 184. This book will show you _____ can be used in other contexts.

选项:

• A. how you have observed

• B. how what you have observed

• C. that you have observed

• D. how that you have observed

答案: 请关注公众号【青年搜题】查看答案

问题 185: 185. When making modern cameras, people began to_____plastics for metal.

选项:

• A. surround

• B. substance

• C. stretch

• D. substitute

答案: 请关注公众号【青年搜题】查看答案

问题 186: 186. She won't leave the TV set,（）her husband is waiting for his supper

选项:

• A.

• B.

• C.

• D.

答案: 请关注公众号【青年搜题】查看答案

问题 187: 187. Over sixty percent of the city ______ destroyed in the war.
Thirty-five percent of the doctors ______ women.

选项:

• A. was,was

• B. was,were

• C. were,were

• D. were,was

答案: 请关注公众号【青年搜题】查看答案

问题 188: 188. John ______ to be a teacher before the 试卷库 war, but now he works in a hospital.

选项:

• A. use

• B. was used

• C. used

• D. is used

答案: 请关注公众号【青年搜题】查看答案

问题 189: 189. _____ was the idea _____ the wife thought of?

选项:

• A. What,that

• B. That,what

• C. How,why

• D. Why,how

答案: 请关注公众号【青年搜题】查看答案

问题 190: 190. They are ______ students that they all performed well in the nationwide examinations.

选项:

• A. so diligent

• B. such diligent

• C. so much diligent

• D. such very diligent

答案: 请关注公众号【青年搜题】查看答案

问题 191: 191. Free medical service is_____to nearly all the college students in China.

选项:

• A. favorite

• B. available

• C. convenient

• D. average

答案: 请关注公众号【青年搜题 学起Plus试卷库最新版 】查看答案

问题 192: 192. The disc, digitally _____ in the studio, sounded fantastic at the party that night.

选项:

• A. recorded

• B. recording

• C. to be recorded

• D. having recorded

答案: 请关注公众号【青年搜题】查看答案

问题 193: 193. _____ today, he would get there by Friday.

选项:

• A. Would he leave

• B. Was he leaving

• C. Were he to leave

• D. If he leave

答案: 请关注公众号【青年搜题】查看答案

问题 194: 194. Their victory is _____,for they’ve lost too many men.

选项:

• A. out of question

• B. out of the question

• C. out question

• D. of question

答案: 请关注公众号【青年搜题】查看答案

问题 195: 195. He speaks so quickly that I didn’t ______ what he said.

选项:

• A. receive

• B. listen

• C. take

• D. catch

答案: 请关注公众号【青年搜题】查看答案

问题 196: 196. This is one of _____ interesting books on your subject.

选项:

• A. the most

• B. the most of the

• C. most

• D. most of the

答案: 请关注公众号【青年搜题】查看答案

问题 197: 197. He grabbed me _____ and pulled me onto the bus.

选项:

• A. a arm

• B. an arm

• C. the arm

• D. by the arm

答案: 请关注公众号【青年搜题】查看答案

问题 198: 198. I don’t think this kind of medicine has any ______.

选项:

• A. answer

• B. cause

• C. effect

• D. work

答案: 请关注公众号【青年搜题】查看答案

问题 199: 199. Among the universities Oxford and Cambridge（）a dominant position.

选项:

• A.

• B.

• C.

• D.

答案: 请关注公众号【青年搜题】查看答案

问题 200: 200. He talked as if he _____ for years.

选项:

• A. is living there

• B. was living there

• C. has lived there

• D. had lived there

答案: 请关注公众号【青年搜题】查看答案

问题 201: 1. 在0（ ）之间写上正确的符号

选项:

• A. =

• B.

• C.

• D.

答案: 请关注公众号【青年搜题】查看答案

问题 202: 2. 设G是一棵树，n,m分别表示顶点数和边数，则

选项:

• A. n=m

• B. m=n+1

• C. n=m+1

• D. 不能确定

答案: 请关注公众号【青年搜题】查看答案

问题 203: 3. 设全体域D是正整数集合，确定下列命题的真值

选项:

• A. xy (xy=y)

• B. xy(x+y=y)

• C. xy(x+y=x)

• D. xy(y=2x)

答案: 请关注公众号【青年搜题】查看答案

问题 204: 4. 设G是一棵树，则G的生成树有（ ）棵？

选项:

• A. 0

• B. 1

• C. 2

• D. 不确定

答案: 请关注公众号【青年搜题】查看答案

问题 205: 5. 6阶有限群的任何子群一定不是（ ）

选项:

• A. 2阶

• B. 3阶

• C. 4阶

• D. 6阶

答案: 请关注公众号【青年搜题】查看答案

问题 206: 6.

选项:

• A. 4, 5

• B. 5, 6

• C. 4, 10

• D. 5, 8.

答案: 请关注公众号【青年搜题】查看答案

问题 207: 7. 设G是一个哈密尔顿图，则G一定是个（ ）。

选项:

• A. 欧拉图

• B. 树

• C. 平面图

• D. 联通图

答案: 请关注公众号【青年搜题】查看答案

问题 208: 8. 下列哪个偏序集构成有界格

选项:

• A.

• B.

• C.

• D.

答案: 请关注公众号【青年搜题】查看答案

问题 209: 9. 任意一个具有2个或以上元的半群，它（ ）

选项:

• A. 不可能是群

• B. 不一定是群

• C. 一定是群

• D. 是交换群

答案: 请关注公众号【青年搜题】查看答案

问题 210: 10. 设无向图G有16条边且每个顶点的度数都是2，则图G有( )个顶点

选项:

• A. 10

• B. 4

• C. 8

• D. 16

答案: 请关注公众号【青年搜题】查看答案

问题 211: 11. 设集合A = {1,2,3,4}, A上的关系R＝{(1,1),(2,3),(2,4),(3,4)}, 则R具有______

选项:

• A. 自反性

• B. 传递性

• C. 对称性

• D. 以上答案都不对

答案: 请关注公众号【青年搜题】查看答案

问题 212: 12. 设G、H是一阶逻辑公式，P是一个谓词，G＝xP(x), H＝xP(x),则一阶逻辑公式GH是______

选项:

• A. 恒真的

• B. 恒假的

• C. 可满足的

• D. 前束范式

答案: 请关注公众号【青年搜题】查看答案

问题 213: 13. 若

选项:

• A.

• B.

• C.

• D.

答案: 请关注公众号【青年搜题】查看答案

问题 214: 14. 若供选择答案中的数值表示一个简单图中各个顶点 免费试题下载 的度，能画出图的是________

选项:

• A. (1,2,2,3,4,5)

• B. (1,2,3,4,5,5)

• C. (1,1,1,2,3)

• D. (2,3,3,4,5,6).

答案: 请关注公众号【青年搜题】查看答案

问题 215: 15. 下面给出的集合中，哪一个不是前缀码( )

选项:

• A. {a，ab，110，a1b11}

• B. {01，001，000，1}

• C. {1，2，00，01，0210}

• D. {12，11，101，002，0011}

答案: 请关注公众号【青年搜题】查看答案

问题 216: 16. 设集合A={2,{a},3,4}，B = { {a},3,4,1}，E为全集，则下列命题正确的是______

选项:

• A. {2}A

• B. {a}A

• C. { {a}}BE

• D. { {a},1,3,4}B.

答案: 请关注公众号【青年搜题】查看答案

问题 217: 17. 判断下列命题哪个为真?( )

选项:

• A. A-B=B-A =＞ A=B

• B. 空集是任何集合的真子集

• C. 空集只是非空集合的子集

• D. 若A的一个元素属于B，则A=B

答案: 请关注公众号【青年搜题】查看答案

问题 218: 18. 设G是有n个结点m条边的连通平面图，且有k个面，则k等于

选项:

• A. m-n+2

• B. n-m-2

• C. n+m-2

• D. m+n+2

答案: 请关注公众号【青年搜题】查看答案

问题 219: 19. 设集合

选项:

• A.

• B.

• C.

• D.

答案: 请关注公众号【青年搜题】查看答案

问题 220: 20. 设无向图G有18条边且每个顶点的度数都是3，则图G有（ ）个顶点。

选项:

• A. 10

• B. 4

• C. 8

• D. 12

答案: 请关注公众号【青年搜题】查看答案

问题 221: 21. 设T是一棵树，则T是一个联通且有简单回路图。

选项:

答案: 请关注公众号【青年搜题】查看答案

问题 222: 22. 代数系统

选项:

答案: 请关注公众号【青年搜题】查看答案

问题 223: 23. 设

选项:

答案: 请关注公众号【青年搜题】查看答案

问题 224: 24. 任一有向图中，度数为奇数的结点有奇数个。

选项:

答案: 请关注公众号【青年搜题】查看答案

问题 225: 25. A上的任一良序 学起Plus期末试题及答案 关系一定是A上的全序关系。

选项:

答案: 请关注公众号【青年搜题】查看答案

问题 226: 26. 永真式的否定是永假式。

选项:

答案: 请关注公众号【青年搜题】查看答案

问题 227: 27. 有n个结点的树，其结点度数之和是2n.

选项:

答案: 请关注公众号【青年搜题】查看答案

问题 228: 28.

选项:

答案: 请关注公众号【青年搜题】查看答案

问题 229: 29. 设

选项:

答案: 请关注公众号【青年搜题】查看答案

问题 230: 30. 任意一个具有2个或以上元的半群，它不可能是群。

选项:

答案: 请关注公众号【青年搜题】查看答案

问题 231: 31. 若R和S都是非空集A上的等价关系，则

选项:

答案: 请关注公众号【青年搜题】查看答案

问题 232: 32. 一棵无向树的顶点n和边数m的关系是m=n-1.

选项:

答案: 请关注公众号【青年搜题】查看答案

问题 233: 33. 是

选项:

答案: 请关注公众号【青年搜题】查看答案

问题 234: 34. “明天会下雨吗？”是个命题。

选项:

答案: 请关注公众号【青年搜题】查看答案

问题 235: 35.

选项:

答案: 请关注公众号【青年搜题】查看答案

问题 236: 36. 设集合

选项:

答案: 请关注公众号【青年搜题】查看答案

问题 237: 37.

选项:

答案: 请关注公众号【青年搜题】查看答案

问题 238: 38. 若一棵完全二元树有2n-1个顶点，则它有n片树叶。

选项:

答案: 请关注公众号【青年搜题】查看答案

问题 239: 39.

选项:

答案: 请关注公众号【青年搜题】查看答案

问题 240: 40. 设集合

选项:

答案: 请关注公众号【青年搜题】查看答案

问题 241: 1. 设P：我去看电影，Q：我有时间，将命题“我去看电影，仅当我有时间”可符号化为 （ ）。

选项:

• A.

• B.

• C.

• D.

答案: 请关注公众号【青年搜题】查看答案

问题 242: 2. 下列关于集合的表示中正确的为______

选项:

• A. {a}{a,b,c}

• B. {a}{a,b,c}

• C. {a,b,c}

• D. {a,b}{a,b,c}

答案: 请关注公众号【青年搜题】查看答案

问题 243: 3. 设无向图G有16条边且每个顶点的度数都是2，则图G有( )个顶点

选项:

• A. 10

• B. 4

• C. 8

• D. 16

答案: 请关注公众号【青年搜题】查看答案

问题 244: 4. 判断下列命题哪个为真?( )

选项:

• A. A-B=B-A =＞ A=B

• B. 空集是任何集合的真子集

• C. 空集只是非空集合的子集

• D. 若A的一个元素属于B，则A=B

答案: 请关注公众号【青年搜题】查看答案

问题 245: 5. 设G是一个哈密尔顿图，则G一定是

选项:

• A. 欧拉图

• B. 树

• C. 平面图

• D. 连通图

答案: 请关注公众号【青年搜题】查看答案

问题 246: 6. 下列哪个偏序集构成有界格

选项:

• A.

• B.

• C.

• D.

答案: 请关注公众号【青年搜题】查看答案

问题 247: 7. 设谓词P(x)：x是奇数，Q(x)：x是偶数，谓词公式 x(P(x)Q(x))在哪个个体域中为真?

选项:

• A. 自然数

• B. 实数

• C. 复数

• D. (1)--(3)均成立

答案: 请关注公众号【青年搜题】查看答案

问题 248: 8. 设集合A={2,{a},3,4}，B = { {a},3,4,1}，E为全集，则下列命题正确的是______

选项:

• A. {2}A

• B. {a}A

• C. { {a}}BE

• D. { {a},1,3,4}B.

答案: 请关注公众号【青年搜题】查看答案

问题 249: 9. 设G是5个顶点的完全图，则从G中删去______条边可以得到树.

选项:

• A. 6

• B. 5

• C. 10

• D. 4.

答案: 请关注公众号【青年搜题】查看答案

问题 250: 10. 下面给出的集合中，哪一个不是前缀码( )

选项:

• A. {a，ab，110，a1b11}

• B. {01，001，000，1}

• C. {1，2，00，01，0210}

• D. {12，11，101，002，0011}

答案: 请关注公众号【青年搜题】查看答案

问题 251: 11. 下列语句中，_______是命题。

选项:

• A. 请把门关上

• B. 地球外的星球上也有人

• C. x + 5 ＞ 6

• D. 下午有会吗？

答案: 请关注公众号【青年搜题】查看答案

问题 252: 12. 若

选项:

• A.

• B.

• C.

• D.

答案: 请关注公众号【青年搜题】查看答案

问题 253: 13.

选项:

• A. 4, 5

• B. 5, 6

• C. 4, 10

• D. 5, 8.

答案: 请关注公众号【青年搜题】查看答案

问题 254: 14. 设命题公式G＝(PQ)，H＝P(QP)，则G与H的关系是______

选项:

• A. GH

• B. HG

• C. G＝H

• D. 以上都不是.

答案: 请关注公众号【青年搜题】查看答案

问题 255: 15. 在0（ ）之间写上正确的符号

选项:

• A. =

• B.

• C.

• D.

答案: 请关注公众号【青年搜题】查看答案

问题 256: 16. 有限布尔代数的元素的个数一定等于（ ）

选项:

• A. 偶数

• B. 奇数

• C. 4的倍数

• D. 2的正整数次幂

答案: 请关注公众号【青年搜题】查看答案

问题 257: 17. 设G是一个哈密尔顿图，则G一定是个（ ）。

选项:

• A. 欧拉图

• B. 树

• C. 平面图

• D. 联通图

答案: 请关注公众号【青年搜题】查看答案

问题 258: 18. 下面给出的集合中，哪一个是前缀码

选项:

• A. {0，10，110，101111}

• B. {01，001，000，1}

• C. {b，c，aa，ab，aba}

• D. {1，11，101，001，0011}

答案: 请关注公众号【青年搜题】查看答案

问题 259: 19. 集合A={1,2,…,10}上的关系R={|x+y=10,x,yA}，则R 的性质为（ ）

选项:

• A. 自反的

• B. 对称的

• C. 传递的，对称的

• D. 传递的

答案: 请关注公众号【青年搜题】查看答案

问题 260: 20. 设A, B为集合，当_____时A－B＝B.

选项:

• A. A＝B

• B. AB

• C. BA

• D. A＝B＝.

答案: 请关注公众号【青年搜题】查看答案

问题 261: 21. 设半序集(A,≤)关系≤的哈斯图如下所示，若A的子集B = {2,3,4,5},则元素6为B的_______

选项:

• A. 下界

• B. 上界

• C. 最小上界

• D. 以上答案都不对

答案: 请关注公众号【青年搜题】查看答案

问题 262: 22. 下列建立在集合

选项:

• A.

• B.

• C.

• D.

答案: 请关注公众号【青年搜题】查看答案

问题 263: 23. 设G、H是一阶逻辑公式，P是一个谓词，G＝xP(x), H＝xP(x),则一阶逻辑公式GH是______

选项:

• A. 恒真的

• B. 恒假的

• C. 可满足的

• D. 前束范式

答案: 请关注公众号【青年搜题】查看答案

问题 264: 24. 下列语句中是真命题的为（ ）。

选项:

• A. 我正在说谎。

• B. 如果2+3=5，那么雪是黑色的。

• C. 严禁在教室里吸烟！

• D. 如果2+3=8，那么雪是黑色

答案: 请关注公众号【青年搜题】查看答案

问题 265: 25. 设G是连通平面图，有5个顶点，6个面，则G的边数是_______

选项:

• A. 9条

• B. 5条

• C. 6条

• D. 11条.

答案: 请关注公众号【青年搜 青书学堂免费题库分享 题】查看答案

问题 266: 26. 无向图G中的边e是其割边的充要条件是 （ ）。

选项:

• A. 边e不是平行边

• B. 边e是平行边

• C. 边e不包含在G的任意闭迹中

• D. 边e不包含在G的任意闭回路中

答案: 请关注公众号【青年搜题】查看答案

问题 267: 27. 给定下列数字序列，哪一个可以构成简单无向图的顶点度序列。（ ）

选项:

• A.

• B.

• C.

• D.

答案: 请关注公众号【青年搜题】查看答案

问题 268: 28. 设A={a,{a}}，下列命题错误的是

选项:

• A. {a}P(A)

• B. {a}P(A)

• C. { {a}}P(A)

• D. { {a}}P(A)

答案: 请关注公众号【青年搜题】查看答案

问题 269: 29. 设G是一棵树，n,m分别表示顶点数和边数，则

选项:

• A. n=m

• B. m=n+1

• C. n=m+1

• D. 不能确定

答案: 请关注公众号【青年搜题】查看答案

问题 270: 30. 集合

选项:

• A. 自反的

• B. 对称的

• C. 传递的，对称的

• D. 传递的

答案: 请关注公众号【青年搜题】查看答案

问题 271: 31. 下列公式中哪些是永真式

选项:

• A.

• B.

• C.

• D.

答案: 请关注公众号【青年搜题】查看答案

问题 272: 32. 设有下列公式，请问哪几个是永真蕴涵式

选项:

• A.

• B.

• C.

• D.

• E.

• F.

答案: 请关注公众号【青年搜题】查看答案

问题 273: 33. 判断下列命题哪几个为正确？

选项:

• A.

• B.

• C.

• D.

• E.

答案: 请关注公众号【青年搜题】查看答案

问题 274: 34. 判断下列语句是不是命题。若是，给出命题的真值

选项:

• A. 北京是中华人民共和国的首都

• B. 陕西师大是一座工厂

• C. 你喜欢唱歌吗？

• D. 若7+8＞18，则三角形有4条边

• E. 前进！

• F. 给我一杯水吧！

答案: 请关注公众号【青年搜题】查看答案

问题 275: 35. 下列哪些公式为永真式？（ ）

选项:

• A.

• B.

• C.

• D.

答案: 请关注公众号【青年搜题】查看答案

问题 276: 36.

选项:

答案: 请关注公众号【青年搜题】查看答案

问题 277: 37. 一棵无向树的顶点n和边数m的关系是m=n-1.

选项:

答案: 请关注公众号【青年搜题】查看答案

问题 278: 38. n阶无向完全图

选项:

答案: 请关注公众号【青年搜题】查看答案

问题 279: 39. 设

选项:

答案: 请关注公众号【青年搜题】查看答案

问题 280: 40. 设集合

选项:

答案: 请关注公众号【青年搜题】查看答案