从方框中选出适当的句子补全对话。

A:   小题1:  

B: No, that’s John. Jack is shorter than John.

A: They look the same.     小题2:  

B: Yes, they are. And they are my best friends. We have the same hobbies(爱好).

A: Then, what are your hobbies?

B:    小题3:   

A: Do you have any differences?

B: Yes. 小题4:  

A: Why do you like them?

B: 小题5: 

A．Are they twins?

B．They are more outgoing than me and I am more serious than them.

C．Is that Jack?

D．Because I like to have friends who are like me.E. We all enjoy playing the guitar and we like sports.

分析焊接参数和工艺因素对焊缝成形的影响规律。