根据对话内容，在空白处填写适当的话语，使对话完整。

A: Who is your best friend, Holly?

B: Peter.  

A:(1) ____   ?

B: Because he likes to do the same things as I do.  (2) ____  

A:  Are you good at sports,  too?

B:  Well, I like sports.  But he is more (3) ____   than me.

A: What else do you like about Peter?

B:  He's funnier than I am.  How about you, Sam? Who's (4)_____?

A: My best friend is David.

B:(5)_____?

A:  He's tall and strong.  He is very outgoing.

1. ____   2. ____   3. ____   4. ____   5. ____  

当用钢尺作较精密的量距时，一般对丈量结果应加尺长、温度和拉力改正；如果是悬空丈量，则还应加（）改正。

A、高程；

B、高差；

C、垂曲；

D、常数