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问题 单项选择题

乳牙根管充填材料中，氧化锌糊剂具有的特性是（）

A.糊剂吸收迟缓于乳牙根的吸收，有时导致乳牙滞留

B.提供碱性环境

C.充填后没有炎症反应

D.出现早于乳牙根生理吸收的吸收现象

E.X线不显影

答案

参考答案：A

改错题

全文共有十个错处,先在错的下方划线，然后把答案写在右边的横线上

Thank you for invite me to the free

summer English course in you school. As for my

choice of the two courses, I like the five-weeks

course for 50 hours. This would allows me more

time to see your beautiful country while learned

language. I’d like to do some travel and make

a few new friends. In all the subjects I’m learning

at school, I like English best. I hope me to take this

chance to improve my speak English as much

as possible. I believe I will have wonderful time

in England this summer.
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单项选择题



Which of the following is true about him

A．He always makes mistakes.

B．He is forty.

C．He likes numbers about everything.

D．He is overcritical.
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