为下列问句选答语。

( )1. Can I help you?

(     )2. How much is it?

(     )3. What colour is it?

(     )4.Is it cheap?

(     )5. How many books do you have?

A. It's ten yuan.

B. No, it's expensive.

C. Fifteen.

D. Yes.

E. It's yellow.

在天疱疮的临床分型中，预后最差的是（）。

A.寻常型

B.增殖型

C.落叶型

D.红斑型

E.特殊类型