情景交际。

Teacher: You look worried, Paul.

Paul: I am, Ms Mitchell. _   1  

Teacher : You said you liked English.   2  

Paul: I can't get the pronunciation right.

Teacher: Well, listening can help.  3  You can listen to them at home and repeat the sentences that are difficult for y6u.

Paul:   4  But what about all the new words?

Teacher: You can always write the new words in your notebook and study them at home or on the way to school.

Paul :   5   Thanks.

A. That might really help.      

B. Why don't you listen to tapes?

C. I'm having some trouble learning English.

D. What's the problem?

E. That's a good idea.

1.       2.        3.         4.          5.        

0.5级电压互感器测得的比差和角差分别为-0.275%和+19′，经修约后的数据应为（）。

A、-0.25%和+18′

B、-0.28%和+19′

C、-0.30%和+20′

D、-0.28%和+20′