根管治疗的三步骤为A．根管扩大、根管冲洗、根管充填 B．根管预

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问题单项选择题

根管治疗的三步骤为

A．根管扩大、根管冲洗、根管充填

B．根管预备、根管消毒、根管充填

C．根管预备、根管冲洗、根管充填

D．根管预备、根管充填、牙体修复

答案

参考答案：B

完形填空

单句填空：

小题1:Dr Yuan___________________ his life. However, he doesn’t care about being famous.

小题2:Why not study at medical college like Lin Qiaozhi and _________ her good work?

小题3:She spent years _________ and recording chimps’ daily activities

小题4:She has argued that wild animals should________ and not used for entertainment or advertisements.

单项选择题

（）属于地下害虫。

A.天牛

B.叶蜂

C.蝼蛄

D.蚜虫