给下列的问句选择合适的答语。( ) 1. Where is she from?(

_____________ good-looking boys they are! [ ]

A. How

B. What

C. What a

已知函数y-（m²-m）x²+mx+（m+1）（m 是常数），当m为何值时：  

（1）函数是一次函数；  

（2）函数是二次函数。

补全对话。

Dick: Excuse me, Lucy. Have you got a dictionary?

Lucy: Sorry, I haven't. You may ask Meimei. (1) ________

Dick: Excuse me, Meimei. Have you got a dictionary?

Meimei: Yes. (2) ________

Dick: Thank you. I'll give it back soon. By the way, tomorrow is my birthday. (3) ________

Meimei: Yes, I'd love to. (4) ________

Dick: About seven o' clock..

Meimei: I'll try to be there on time, but (5) ________

Dick: It doesn't matter. Work must come first.

中动脉中膜（）

A.管径小于0.3mm

B.大量弹性膜

C.大量纵行平滑肌

D.大量环形平滑肌

E.管径0.3～1mm

气管切开的患者，每日呼吸道所蒸发的水分约为

A．500ml
B．1000ml
C．1500ml
D．2000ml
E．2500ml