以下哪种病变X线片表现为根尖周圆形低密度透射区．边缘有一薄层_爱下问搜题

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问题单项选择题

以下哪种病变X线片表现为根尖周圆形低密度透射区．边缘有一薄层密质白线

A．急性根尖周炎

B．慢性根尖脓肿

C．根尖肉芽肿

D．根尖囊肿

E．牙骨质增生

答案

参考答案：D

选择题

—What's your father?

— ____. [ ]

A. He's working in Fukang.

B. He is always kind to others.

C. He is really a good man.

D. He's an engineer.

单项选择题

M5切刀应从切刀卡具上伸出大约A=（）mm。

A.15

B.17

C.19

D.21