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问题 单项选择题 A1/A2型题

釉牙骨质界在颈部相连方式主要为（）。

A.牙骨质少许覆盖在釉质表面

B.釉质牙骨质端端相连

C.二者不相连

D.釉质少许覆盖牙骨质

E.以上均是

答案

参考答案：A

单项选择题

CPU被动，处设主动的接口方式为（）.

A.无条件程控方式

B.查询控制方式

C.中断控制方式

D.A，B，C都不对
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单项选择题

Woman: Have you heard about the plane crash yesterday It caused 120 deaths. I’m never at ease when taking a flight.
Man: Though we often hear about air crashes and serious casualties, flying is still one of the safest ways to travel.
Question: What do we learn from this conversation（）。

A. The man thinks travelling by air is quite safe.

B. The woman never travels by plane.

C. Both speakers feel nervous when flying.

D. The speakers feel sad about the serious loss of life.
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