将铜棒和铝棒用导线连接后插入浓硝酸溶液中，下列叙述中正确的是（　　）

A．该装置能形成原电池，其中铝是负极

B．该装置能形成原电池，其中铜是负极

C．该装置不能形成原电池

D．以上说法均不正确

句型转换

1. I was born in 1976.(对画线部分提问)

___________ __________you born?

2. This box is small.(改为同义句)

This box is__________ ___________

3. She is going there by bike.(对画线部分提问)

__________________________________________________

4. What interesting news it is!(用"how"改为另一种感叹句) 

________ _________the news is !

5. Jack is going to be a doctor when he grows up.(对画线部分提问)

_____________________________________________