制作可卸代型模型时，要求修整后的工作模型底部到患牙颈缘的厚度

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问题单项选择题

制作可卸代型模型时，要求修整后的工作模型底部到患牙颈缘的厚度在

A．5.0mm左右

B．3.0mm左右

C．7.0mm左右

D．6.0mm左右

E．4.0mm左右

答案

参考答案：C

句型转换

句型转换。按要求完成下列句子，每空一词。

1. It is necessary to do eye exercises between classes. (改为同义句)

_____ eye exercises between classes _____ necessary.

2. Playing sports right after meals is bad for our health. (加good 变为选择疑问句)

_____ playing sports right after meals bad _____ _____ for your health?

3. You may watch TV for 2 hours tonight. (改为一般疑问句并作否定回答)

_____ _____ watch TV for 2 hours tonight?

_____ , you _____ .

4. I usually sleep 7 hours every night. (对画线部分提问)

_____ _____ do you usually sleep every night?

5. Don't walk on the lawn. (用must改写句子,其句意不变)

You _____ _____ on the lawn.

填空题

痔在齿线以上称为（），在齿线以上称为（）。