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问题 单项选择题 A1/A2型题

以下关于牙体预备中牙髓保护的说法中错误的是（）

A.牙体预备分次完成

B.轻压磨切

C.尽量少磨牙

D.预备时间歇、短时磨切

E.水雾冷却

答案

参考答案：A

填空题

根据短文内容，用方框中所给单词的适当形式填空，每词限用一次。

The number of adults who smoke in the UK has fallen in recent years. Smoking among children,   小题1:, is increasing. More and more young people get to depend on cigarettes, just as adults do.   Most of these young people here are    小题2:  fourteen and sixteen. Smoking among teenagers is as popular now as it   小题3:  20 years ago. Cigarettes still  小题4: 120,000 people a year. And doctors say unless that changes, it will become one of the health   小题5:  of the future.
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单项选择题

A tide is called diurnal when（）.

A.only one high and one low water occur during a lunar day

B.the high tide is higher and the low tide is lower than usual

C.the high tide and low tide are exactly six hours apart

D.two high tides occur during a lunar day
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