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问题 单项选择题

粉剂由二氧化硅、三氧化二铝和氟化钙组成的粘固粉是（）

A.氧化锌丁香油粘固粉

B.聚羧酸锌粘固粉

C.玻璃离子粘固粉

D.磷酸锌粘固粉

E.复合树脂

答案

参考答案：C

解析：

复合树脂残存单体可刺激牙髓。玻璃离子粘固粉粉剂由二氧化硅、三氧化二铝和氟化钙组成，聚羟酸锌粘固粉粉剂由煅烧过的氧化锌和氧化镁混合物组成。【考点提示】常用材料的性能及其选择

填空题

用who / whom / which / where / when / that 填空。

1. Here are players from Japan, some of ______ are our old friends.

2. She lives in a small village, ______ is only three miles from here.

3. She is going to spend the summer holidays in Shanghai, ______ she has some friends.

4. We'll put off the meeting till next week, ______ we won't be so busy.

5. The sun gives the earth light and heat, ______ is very important to the living things.

6. Those ______ want to go to the computer room write your names here.

7. He was often late, ______ made his teacher very angry.

8. Who is the person ______ is standing at the gate?

9. He talked about the teachers and schools ______ he had visited.
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单项选择题

我国中央银行对商业银行的再贷款以( )为主。

A．浮息贷款

B．准备金贷款

C．中长期贷款

D．抵押贷款
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