关于腹股沟疝，下列哪项是错误的（） A.斜疝多见于儿童及青壮年 B.直疝疝囊在精索后

下颌发育不足一般是（）

A.AngleI类合 

B.AngleⅡ类合 

C.AngleⅢ类合 

D.面部不对称 

E.各类畸形中治疗难度大

根据对话内容，把对话中所叙述的地方标注在下图中空格中。

A: Would you like(愿意) to come to dinner this evening?

B: I'd love to. But how can I get there?

A: Let me tell you. You can take the No. 3 bus. The bus stop(车站) is in front of the post office. You get  off (下车)on Xinhua street, when you can see a Movie House on your left and the bank on the right. Then you walk on and turn left at the second crossing(十字路), just across from the Food Store, there is a building (建筑物). It's the library. My house is next to the library.

B: Oh, Ok. See you.

A: See you soon.

1___________ 2___________  3___________4__________ 5___________

Give this book to　　 you think needs it.

A．who

B．whoever

C．whomever

D．whatever

在变压器纵差保护中，为什么要识别励磁通流？有哪些识别方法？

反应器出口温度联锁会引起以下哪个阀门关闭（）

A.邻苯进料阀

B.风量调节阀

C.盐温调节阀

D.气体冷却器进水阀