根据问句选答语。

( )1. What colour is it?

(     )2. May I have a look?

(     )3. How many books in your bag?

(     )4. How are you?

(     )5. Is this a computer?

A. Yes, it is.

B. Sure, here you are.

C. Fine, thank you.

D. It's white.

E. Thirteen.

从广义上说，应急预案是一个由各级文件构成的（）。

A.文件体系

B.文件

C.最终决定

D.档案