问题 单项选择题

使用压力式液位计时,压力计通过取压管与仪表底部相连,而压力计的安装高度(),否则指示值需加以修正。

A、最好高于液位满量程高度

B、最好等于液位满量程高度

C、最好和取压点在同一水平面上

D、最好在取压点和液位满量程高度之间

答案

参考答案:B

阅读理解

阅读理解。

     Tom arrived at the bus station quite early for Paris bus. The bus for Paris would not leave until five to

twelve. He saw a lot of people waiting in the station. Some were standing in line(排队), others were

walking around. There was a group of schoolgirls. Their teacher was trying to keep them in line. Tom

looked around but there was no place for him to sit.

     He walked into the station cafe(咖啡馆). he looked up at the clock there. It was only twenty to

twelve. He found a seat and sat down before a large mirror(镜子) on the wall. Just then, Mike, one of

Tom's workmates came in and sat with Tom.

     "What time is your bus " asked Mike.

     "There's plenty of time yet," answered Tom.

     "Well, I'll get you some more tea then," said Mike.

     They talked while drinking. Then Tom looked at the clock again. "Oh! It's going backward(倒行)!"

he cried. "A few minutes ago it was twenty to twelve and now it's half past eleven."

     "You're looking at the clock in the mirror." said Mike. Tom was so sad(难过). The next bus was not

to leave for another hour. Since then Tom has never liked mirrors.

1. Tom went into the station cafe because _____. 

A. Mike asked him to have a cup of tea

B. it was quite early and he could find a seat there

C. he didn't like to stay with the schoolgirls

D. he wanted to have a drink with his workmate there

2. What time was it in fact when Tom looked at the clock in the mirror ?

A. Half past twelve

B. Twenty to twelve

C. Half past eleven

D. Half past one

3. From the story we know that when we look at a clock in a mirror, we will find_____ . 

A. the time is right

B .it's going slower  

C. it's going backward 

D. it's going faster

4. Which of the following is true? 

A. Tom arrived in Paris on time  

B. The next bus would leave in half an hour

C. After that Tom didn't like clocks any longer

D. Tom looked at the clock in the mirror only once

5. Which of the following is the title(题目) of the story ?

A. The Mirror of the Station      

B. Not A Careful Man

C. Missing A Bus            

D. The Clock In The Mirror

单项选择题 A1/A2型题