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问题 单项选择题 B型题

基托可以较大范围伸展，并且可承受较大力，并有支持稳定义齿作用的区域是（）

A.中性区

B.舌侧翼缘区后部

C.颊侧翼缘区

D.远中颊角区

E.上颌硬区

答案

参考答案：C

填空题

用所给词的适当形式填空，每空不限一词。

1. I think it's __________ (use) to talk with him. It's difficult to change his mind. 

2. Did you have a nice time __________ (ski) last week? 

3. Our teachers told us that the earth __________ (move) around the sun. 

4. __________ (wolf) eat smaller animals when they are hungry. 

5. __________ (luck), he didn't hurt badly. 

6. His grandpa is ill. He was even __________ (ill) this morning. 

7. When I saw the squirrels, I became __________ (interest) in them. 

8. Can you teach me how __________ (dance)? 

9. I __________ (drive) to Beijing when my car broke down. 

10. Don't leave the baby by __________ (he). It's not safe to leave him alone at home.

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多项选择题

下列属于PERL电池片结构的特点有（）

A、使用高品质的P型FZ单晶硅片

B、为了提高电池片表面的光封闭效率，形成了倒金字塔形的蚀刻表面

C、为了提高减反射膜的效率，采用了3层结构

D、在钝化膜表面开设了小孔，由于在此形成电极，所以可以减少电极部分的金属和硅的接触面积
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