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提问人:网友13***556 发布时间:2022年3月24日 14:50
[单项选择题]

电力线路过电流保护的动作时间一般在()。

A、0.2-0.5s

B、0.5-0.8s

C、0.8-1s

D、1-1.2s

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Vocabulary Size Test: Version A

1.    see: They .

a. closed it tightly    b. waited for it     c. looked at it      d. started it up

2.    time: They have a lot of

a. money      b. food       c. hours        d. friends

3.    period: It was a difficult .

a. question    b. time     c. thing to do       d. book

4.    figure: Is this the right

?

a. answer     b. place       c. time           d. number

5.    poor: We .

a. have no money    b. feel happy    c. are very interested   d. do not like to work hard

6.    microphone: Please use the .

a. machine for making food hot            b. machine that makes sounds louder

c. machine that makes things look bigger   d. small telephone that can be carried around

7.    nil: His mark for that question was .

a. very bad    b. nothing     c. very good     d. in the middle

8.    pub: They went to the .

a. place where people drink and talk           b. place that looks after money

c. large building with many shops             d. building for swimming

9.    circle: Make a .

a. rough picture      b. space with nothing in it    c. round shape          d. large hole

10.  dig: Our dog often .

a. solves problems with things       b. creates a hole in the ground

c. wants to sleep                   d. enters the water

11.  soldier: He is a .

a. person in a business               b. person who studies

c. person who uses metal              d. person in the army

12.  restore: It has been .

a. said again                      b. given to a different person

c. made like new again             d. given a lower price

13.  pro: He's .

a.someone who is employed to find out important secrets      b. a stupid person

c. someone who writes for a newspaper         d. someone who is paid for playing sport

14.  compound: They made a new .

a. agreement                         b. thing made of two or more parts

c. group of people forming a business   d. guess based on past experience

15.  deficit: The company .

a. spent a lot more money than it earned         b. went down a lot in value

c. had a plan for its spending that used a lot of money  d.had a lot of money stored in the bank

16.  strap: He broke the .

a. promise    b. top cover     c. shallow dish for food     d. strip of strong material

17.  weep: He .

a. finished his course     b. cried       c. died      d. worried

18.  haunt: The house is .

a. full of decorations      b. rented       c. empty      d. full of ghosts

19.  cube: I need one more .

a. sharp thing used for joining things             b. solid square block

c. tall cup with no saucer                      d. piece of stiff paper folded in half

20.  butler: They have a .

a. man servant                      b. machine for cutting up trees

c. private teacher                    d. cool dark room under the house

 

21.  nun: We saw a .

a. long thin creature that lives in the earth          b. terrible accident

c. woman following a strict religious life            d. unexplained bright light in the sky

22.  olive: We bought .

a. oily fruit    b. scented flowers    c. men's swimming clothes     d. tools for digging

23.  shudder: The boy .

a. spoke with a low voice    b. almost fell    c. shook     d. called out loudly

24.  threshold: They raised the .

a. flag                 b. point or line where something changes

c. roof inside a building        d. cost of borrowing money

25.  demography: This book is about .

a. he study of patterns of land use  b. the study of the use of pictures to show facts about numbers

c. the study of the movement of water      d. the study of population 

 


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