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数模 转 换 器 的 分 辨 率 取 决 于 ()。

时间:2017-09-29 12:12来源:未知 作者:admin 点击:
17. 数/模 转 换 器 的 分 辨 率 取 决 于 ()。 A. 输 入 的 二 进 制 数 字 信 号 的 位 数, 位 数 越 多 分 辨 率 越 高 B. 输 出 的 模 拟 电 压 的 大 小, 输 出 的 模 拟 电 压 越 高, 分 辨 率 越 高 C. 参 考 电 压 UR 的 大 小,UR 越 大, 分

地大11春学期《开放英语4》在线作业二


一、单选题(共 25 道试题,共 100 分。)V
1.  Thirty per cent of meals ( )by families in the USA are eaten at one of the big chains.
A. consuming
B. consumed
C. to consume
D. are consumed
      满分:4  分
2.  He has spent five years ( )the novel.
A. at writing
B. to writing
C. in writing
D. write
      满分:4  分
3.  -I'm taking my driving test tomorrow. -( )
A. Cheers!
B. Good luck!
C. Come on!
D. Congratulations!
      满分:4  分
4.  If they ( )searching, I would have died.
A. have given up
B. gave up
C. had given up
D. has given up
      满分:4  分
5.  It's wet on the ground. It ( )yesterday evening.
A. must be
B. should be
C. must have rained
D. should have rained
      满分:4  分
6.  Cities attract people because of the ( )for labour in the manufacturing and service industries.
A. requirement
B. call
C. interest
D. demand
      满分:4  分
7.  Three-quarters of people like it. So that's ( )90%, which is our target.
A. precisely
B. approximately
C. under
D. around
      满分:4  分
地大11春学期《开放英语4》在线作业二
8.  Do you know that gentleman ( )?
A. dressing the black suit
B. in a black suit
C. wears a black suit
D. with the black suit
      满分:4  分
9.  ( )you finish your homework, you can't watch TV.
A. If
B. Therefore
C. However
D. Unless
      满分:4  分
10.  -We are going to have a dancing party tonight. Would you like to join us? -( ).
A. I'm afraid not. Because I have an appointment with my dentist tonight
B. Of course not. I have no idea.
C. No, I can't
D. That's all set
      满分:4  分
11.  -May I see the menu, please? -( ).
A. That is the menu, sir
B. Yes, please go on
C. Here you are, sir
D. Of course, sir
      满分:4  分
12.  I have taken many photos. I'm going to get the film ( ).
A. being developed
B. developed
C. developing
D. to be developed
      满分:4  分
13.  Tom has to work ( )his classmates since he is less clever.
A. twice as hard as
B. twice as hardly as
C. twice hard than
D. twice as harder as
      满分:4  分
14.  This is very important. You ( )remember to shut down your computer every evening.
A. should
B. must
C. ought
D. need
      满分:4  分
15.  ( )she passes her exams, she won't get into university.
A. If
B. Unless
C. When
D. Because
      满分:4  分
地大11春学期《开放英语4》在线作业二
16.  Because the twins are identical, it is impossible to tell ( ).
A. which one from the other
B. one from the other
C. one from which other
D. one and the other
      满分:4  分
17.  You ( )put the passport in the suitcase, I may need it at any time.
A. mustn't have
B. wouldn't have
C. shouldn't have
D. won't have
      满分:4  分
18.  She is ( )of snakes.
地大11春学期《开放英语4》在线作业二

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