从B栏中找出A栏中问句的答句。

                 A                                                              B

( ) 1. What's this ?                                         a. There are seven .

( ) 2. What are these ?                                   b. No, they're glasses.

( ) 3. How many boys are there ?                  c. It's an apple.

( ) 4. Is this a map ?                                      d. Yes, it is.

( ) 5. Are these cups ?                                   e. They're feet.

下列不属于金属材料物理性能的是（）。

A.导电性

B.导热性

C.热膨胀性

D.冲击韧性