半桥粒的组成成分有（） A.BPAG B.板层素 C.整合素 D.亲和素

用括号内所给动词的适当形式填空。

1. He said that he __________ (watch) a basketball match at that time.

2. Caring for wild animals in danger _______ (be) important.

3. I'm sorry _______ (trouble) you, can you lend me your pen?

4. It is hard ________ (reach) the top of the high mountain.

5. Our teacher told us that the moon ________ (move) around the sun.

6. He said he __________ (come) back in two days.

7. I was _________ (surprise) to find some money in my pocket.

8. Her sister is good at _________ (draw).

牙釉质的无机化合物主要是磷酸钙，约占总量的（）

A.60％

B.70％

C.75％

D.80％

E.90％

在保留的地下管线和工程设施附近进行各种工程或种植设计时，应提出对原有物的保护措施和施工要求。

盘点人员在初点作业时，应该按照负责的区域由左到右，由上到下展开盘点。（）