选择恰当的问句。

A. How many cakes?

B. Can I have some milk?

C. How are you?

D. Where is your rabbit?

E. How old are you?

F. Who has no home?

1.                                   

    Panda has no home.

2.                                   

    Here itis.

3.                                   

    Sure! Here you are.

4.                                   

    Fine, thank you.

5.                                   

    One cake.

6.                                    

    I'm ten.

对于焊接性较差的金属，焊前焊后都应采用适当的措施，改善焊缝组织。