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内工大18毕业清考——大学英语(专升本)

内工大18毕业清考——大学英语(专升本)
内工大18毕业清考——大学英语(专升本)

1. (单选题) (单项选择)– He must be a top student in his school. –(本题

2.0分)

A、I have doubt.

B、There is no doubt about it.

C、Yes. No doubt.

D、It is not doubtful.

学生答案: B

标准答案:B

解析:

无.

得分: 2

2. (单选题) (单项选择)Children are encouraged to put ______ some of their pocket money to buy Christmas presents for the poorer ones.(本题2.0分)

A、in

B、off

C、away

D、aside

学生答案: A

标准答案:D

解析:

无.

得分: 0

3. (单选题) (单项选择)The collapse of the World Trade Centre has put U.S. economy in a difficult ____________.(本题2.0分)

A、occasion

B、case

C、situation

D、background

学生答案: C

标准答案:C

解析:

无.

得分: 2

4. (单选题) (单项选择)– How about going to see a film tonight? –(本题2.0分)

A、Oh, it couldn’t be better.

B、Yes, I will go.

C、Of course.

D、Yes, I think so.

学生答案: A

标准答案:A

无.

得分: 2

5. (单选题) (单项选择)–What's the matter? –(本题2.0分)

A、The matter is worse.

B、Nothing is serious.

C、The matter is serious.

D、Something is better.

学生答案: B

标准答案:B

解析:

无.

得分: 2

6. (单选题) (单项选择)Most wage claims are settled by

____________.(本题2.0分)

A、compromise

B、comparable

C、comfortable

D、concentrated

学生答案: A

标准答案:A

无.

得分: 2

7. (单选题) (单项选择)He was barred from the club for refusing to __________ by the rules.(本题2.0分)

A、conform

B、abide

C、adhere

D、comply

学生答案: B

标准答案:B

解析:

无.

得分: 2

8. (单选题) (单项选择)The black car drove away from them and ____________(本题2.0分)

A、appeared

B、fled

C、left

D、disappeared

学生答案: D

解析:

无.

得分: 2

9. (单选题) (单项选择)Children should be taught not to

__________ handicapped people.(本题2.0分)

A、glare at

B、stare at

C、glance at

D、peep at

学生答案: B

标准答案:B

解析:

无.

得分: 2

10. (单选题) (单项选择)Schumacher ____________ effortlessly to his new surroundings.(本题2.0分)

A、adopted

B、adapted

C、accepted

D、obtained

标准答案:B

解析:

无.

得分: 2

11. (单选题) (单项选择)Eggs, though rich in nourishments, have _______ of fat.(本题3.0分)

A、 a large number

B、the large number

C、 a large amount

D、the large a mount

学生答案: A

标准答案:C

解析:

无.

得分: 0

12. (单选题) (单项选择)– How are you getting on with your study? –(本题3.0分)

A、Thanks. And you?

B、I hope all goes well with you.

C、Terrible.

D、Not at all.

学生答案: C

标准答案:C

解析:

无.

得分: 3

13. (单选题) (单项选择)Their dormitory is ______ ours in decoration.(本题3.0分)

A、likely to

B、similar to

C、familiar to

D、intended to

学生答案: B

标准答案:B

解析:

无.

得分: 3

14. (单选题) (单项选择)Haven’t seen you for ages! What are you busy doing now? ____________(本题3.0分)

A、I hate the weather here.

B、My hair is getting a bit longer.

C、I am working part time in a bookshop, you know.

D、Yeah, thanks for coming.

学生答案: C

标准答案:C

解析:

无.

得分: 3

15. (单选题) (单项选择)He looked me right __________ the eyes and lied.(本题3.0分)

A、at

B、in

C、for

D、on

学生答案: A

标准答案:B

解析:

无.

得分: 0

16. (单选题) (单项选择)I’ve tried very hard to improve my English. But by no means ___________ with my progress.(本题3.0分)

A、the teacher is not satisfied

B、is the teacher not satisfied

C、the teacher is satisfied

D、is the teacher satisfied

学生答案: A

标准答案:D

解析:

无.

得分: 0

17. (单选题) (单项选择)Why not join us in baseball?

____________(本题3.0分)

A、Ok. I’m coming.

B、You do the same.

C、Don’t mention it.

D、That’s alright.

学生答案: A

标准答案:D

解析:

无.

得分: 0

18. (单选题) (单项选择)Our basketball team __________ to win the championship game.(本题3.0分)

A、went over

B、went out

C、went in for

D、went all out

学生答案: C

标准答案:D

解析:

无.

得分: 0

19. (单选题) (单项选择)Art is regarded as a/an ____________ of expression.(本题3.0分)

A、means

B、emotion

C、prestige

D、case

学生答案: B

标准答案:A

无.

得分: 0

20. (单选题) (单项选择)I had some trouble __________ the letter. His handwriting is very bad.(本题3.0分)

A、on reading

B、reading

C、to read

D、read

学生答案: B

标准答案:B

解析:

无.

得分: 3

21. (判断题) (判断语法与词汇)It doesn't alter the fact that he was the man responsible for the death of the little girl. (本题2.0分)

A、正确

B、错误

学生答案: B

标准答案:A

得分: 0

22. (判断题) (判断语法与词汇)The hurricane left, leaving the ruins to this area.

(本题2.0分)

A、正确

B、错误

学生答案: B

标准答案:A

解析:

得分: 0

23. (判断题) (判断语法与词汇)He left orders that nothingshould be touched until the police arrived.

(本题2.0分)

A、正确

B、错误

学生答案: A

标准答案:A

解析:

得分: 2

24. (判断题) (判断语法与词汇)It's sometimes hard to tel one twin from the other.

(本题2.0分)

A、正确

B、错误

学生答案: A

标准答案:A

解析:

得分: 2

25. (判断题) (判断语法与词汇)The monitor will speak onbehalf of the students at the opening ceremony.

(本题2.0分)

A、正确

B、错误

学生答案: A

标准答案:A

解析:

得分: 2

26. (判断题) (判断语法与词汇)At the end of 2004, there were around 6,000 foreign printing companies in China, making up

around 4 percent of national total.

(本题2.0分)

A、正确

B、错误

学生答案: A

标准答案:A

解析:

得分: 2

27. (判断题) (判断语法与词汇)Bill always does whatever he pleases, without regard to the feelings of others.

(本题2.0分)

A、正确

B、错误

学生答案: B

标准答案:A

解析:

得分: 0

28. (判断题) (判断语法与词汇).Not only did we lose our money, but we were also in danger of losing our lives.

(本题2.0分)

B、错误

学生答案: B

标准答案:A

解析:

得分: 0

29. (判断题) (判断语法与词汇)After a meal in a restaurant, you ask the waiter for the bill

(本题2.0分)

A、正确

B、错误

学生答案: B

标准答案:A

解析:

得分: 0

30. (判断题) (判断语法与词汇)I don't think this room will be big enough to hold all the guests.

(本题2.0分)

B、错误

学生答案: A

标准答案:A

解析:

得分: 2

31. (填空题) If you were to begin a new job tomorrow, you would bring with you some basic strengths and weaknesses. Success or ___1 n your work would depend, to ___2 great extent, ___3 your ability to use your strengths and weaknesses to the best advantage. _____4 he utmost importance is your attitude.

A person ____5 begins a job convinced that he isn't going to like it or is ____6 that he is going to ail is exhibiting a weakness which can only hinder his success. On the other hand, a person who is secure ____7 his belief that he is probably as capable ___8 doing the work as anyone else and who is willing to make a cheerful attempt ____9 it possesses a certain strength of purpose. The chances are that he will do well。

____10 the prerequisite skills for a particular job is strength. Lacking those skills is obviously a weakness. A bookkeeper who can't add or a carpenter who can't cut a straight line with a saw ____11 hopeless cases. This book has been designed to help you

capitalize

___12 the strength and overcome the _____13 that you bring to the job of learning. But in groups to measure your development, you must first

____14 -stock of somewhere you stand now. ____15 we get further along in the book, we'll be ____16 in some detail with specific processes for developing and strengthening

_____17 skills. However, ____18 begin with, you should pause ____19 examine your present strengths and weaknesses in three areas that are critical to your success or failure in school: your ___20 , your reading and communication skills, and your study habits.

1.()

A.improvement

B.victory

C.failure

D.achievement

2.()

A.a

B.the

C.some

D.ce rtain

3.()

A.in

B.on

C.of

D.

4.()A.Out

of B.Of C.To D.Into

5.()

A.who

B.what

C.that

D.which

6.()

A.ensure

B.certain

C.sure

D.surel y

7.()

A.onto

B.on

C.off

D.i n

8.()

A.to

B.at

C.of

D.for

9.()

A.near

B.on

C.by

D.a

10.()

A.Have

B.Had

C.Having

D.Had been

11.()

A.being

B.been

C.are

D.is

12.()

A.except

B.but

C.for

D.on

13.()

A.idea

B.weakness

C.strength D .advantage

14.()

A.make

B.take

C.do

D.give

15.()

A.as

B.till

C.over D .out

16.()A.deal B.dealt C.be dealt D.dealing

17.()

A.learnt

B.learned

C.learning

D.learn

18.()

A.around

B.to

C.from

D.beside

19.()

A.to

B.onto

C.into

D.with

20.()

A.intelligence

B.work

C.attitude

D. weakness

(本题30.0分)

标准答案:

(1)

2015哈工大机械类专业本科毕业设计(论文)内容要求

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1.课题来源及研究的目的和意义 对于要求三轴稳定的小卫星姿态控制系统,当前主要有喷气、反作用飞轮和力矩陀螺三种控制方式。而其中,反作用飞轮由于具有不消耗推进剂、控制精度高、系统简单灵活可靠并且可以实现整星零动量等优点,而得到广泛的运用。但在转速较低时,由于摩擦力矩的存在,尤其是在转速过零时摩擦力的大小、方向均产生突变,导致反作用轮的输入信号和输出力矩间的线性关系被严重破坏。并且由于静摩擦力明显大于滑动摩擦和粘性摩擦,飞轮在转速较小时会出现最大摩擦力矩大于电机输出力矩的情况,进而陷入有输入无输出的死区,使卫星姿态限于无控状态。随着飞轮电机的输入不断增大,在突破死区时又会由于摩擦力突变会产生较大的扰动,大大限制了该方案的实际应用。因此,如何改善反作用飞轮的低速摩擦性能成为了提高飞轮姿态控制精度的关键课题。 2.国内外在该方向的研究现状及分析 [3]-[5]等小卫星姿态控 对比当前的国内外主要的诸如自适应[1]、变结构[2]、H ∞ 制系统,虽然在精度、稳定性和机动能力上都已达到了较佳的性能,但针对于反作用飞轮的低速摩擦补偿却研究不多,也尚未有较为有效可靠的方案。当前对于低速摩擦补偿,国内外学者主要提出了以下方式:(1)直接补偿:将摩擦力都视作库伦摩擦,并根据库伦摩擦力模型,在飞轮输入信号上叠加一个与转速同向的偏置信号,用以抵消摩擦力。这样虽然可以改善一部分飞轮性能,但由于模型的不精确而且所受摩擦力不全是库伦摩擦,导致在反作用飞轮转速过零时补偿效果减弱甚至失效;(2)变增益[6]-[8]:在低速过零时提高飞轮转速的反馈增益,即提高了系统转速跟踪的精度,但过高的反馈增益会导致系统能耗增加而且削弱系统稳定性甚至产生极限环振荡现象;(3)高频线性化[9]:当反作用轮转速低于某个阈值时,将高频正弦震颤信号叠加进输入信号中,使原本不连续的摩擦特性得到了较好的线性化,但此方法受限于附加的高频震颤信号和飞轮的摩擦频率特性。(4)变结构控制[10]-[16]:将摩擦力在飞轮过零时的突变视作模型的不确定性,并假设不确定上界已知。这种方式虽然有效,但可能导致较大的震颤和控制量,故仍具有一定的保守型和改进空间。 3.主要研究内容 本文对比了现有的摩擦补偿方案,决定设计摩擦补偿观测器,并采用变结构控制的方式,使系统按照预定“滑动模态”的状态轨迹运动,改善飞轮的低速摩擦性能。结合现有的知识技能,需要进一步研究的内容主要包括:

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