完成句子。

A: Hello, Jane! I'm making a survey. __1__

B: Sure.

A: __2__?

B: I think I'm creative and outgoing.

A: __3__?

B: I would give my students less homework.

A: Good. What would you do if your teacher asked you to give a speech in front of the whole

    school?

B: I'd say yes.

A: Well, what would you do if your friends were in trouble?

B: __4__.

A: Wow, you are pretty confident and helpful. __5__.

B: You're welcome.

下列混合方式中，（）的水头损失最大。

A.水泵棍合

B.管式静态混合器

C.桨板式机械混合池

D.水堰跌落混合