补全对话。

A: 1             me. 2              is the bank, please?

B: 3            , I don't know. Please go and 4             he policeman over there. He may 5             he way.

A: Excuse me. Which is the 6             to the bank, please?

C: Go 7              is road, 8             the second 9             on the left and you'll 10             it.

A: Thank you very much. 

不管外电路是否闭合，只要穿过电路的磁通量发生变化，电路中就产生感生电动势。