Mother: You don’t look happy, Cathy.       小题1:        

Cathy: I didn’t do well in the chemistry test.

Mother: Really? I could hardly believe you were not doing well in chemistry.             小题2:       What happened this time?

Cathy:    小题3:      I found all the questions easy and I finished the test in no time.

Mother: Yes. It is one of your weaknesses.

Cathy: Yes.      小题4:      I made some very stupid mistakes that I shouldn’t have made.

Mother:       小题5:       

Cathy: Yes, I have certainly learned a lesson.

A．I know you are very good at chemistry.

B．What’s wrong?

C．I was too careless.

D．I feel angry at it.E. You are right.

F. Well, next time you should be more careful.

G. I don’t know.

正确的断路器控制回路设计是( )。

A．应有电源监视，并宜监视跳合闸线圈回路的完整性；
B．应能指示断路器合闸与跳闸的位置状态，自动合闸或跳闸时应有明显信号；
C．合闸或跳闸后应使命令脉冲保持；
D．有防止断路器“跳跃”的电气闭锁措施。