下列有关行政事业单位预算管理组织体系的表述中，正确的是（）。A.预算业务管理决策机构

先将总体按某标志分为不同的类别或层次，然后在各个类别中采用简单随机抽样或系统抽样的方式抽取子样本，这样的抽样方式称为（）

选用恰当的代词填空。    

1. _____ have a ruler. But _____ ruler is short. Can you give _____ a long ruler? (I, me, my)

2. _____ are a good boy. What's _____ name? (you, your)

3. _____ is a teacher. _____ name is Wang Li. (she, her)

4. David is an American boy. _____ is twelve. _____ English is not good. Please help _____ .

    (he, him, his)

5. This is _____ school. _____ study English here. Do you want to join _____ ? (we, us, our)

6. Look at _____ ! _____ are from England. _____ names are Lucy and Lily. (they, them, their )

7. _____ have a good friend. _____ name is Tom. _____ parents work in China. _____ are teachers.

    Look, this is _____ photo. How happy _____ are!

8. Thank _____ for helping _____ , Dale. I can do _____ homework now. Let _____ go to a movie.

    _____ think _____ is a funny movie.

一、(10分)公司将要召开产品订货会，请列出会议出席证(或姓名卡片)所应注意的事项，并为公司2003年产品订货会设计一个会议证。 行政经理 王 辉 2003．5．22

说明固相反应的步骤

N－亚硝基化合物致癌作用与黄曲霉素相比最大的区别是（）。

A.霉变食品

B.长期摄入

C.人体内可以自行合成

D.外界合成

E.毒力与毒素量有关