在成本分析中，职工工资属于（）。 A.固定成本 B.变动成本 C.机会成本 D.间接

9.929292…保留一位小数是______；保留两位小数是______；保留整数是______．

用括号内所给动词的适当形式填空。

1. He always _____________ (shout) at others. That is not good.

2. _____________ (not bring) friends from other class.

3. Do you have a difficult time ______________(work) out these math problems?

4. I'm sorry I have no time _____________ (watch) TV now.

5. Her mother asks her not to play computer games too much. If she _________ (do), her mother will

   be mad at her.

6. I am ______________ (leave) for Washington next Sunday.

7. I am learning how_______(swim).

8. Don't forget _________ (take ) away what you bring there.

对实行定额备用金制度的企业，在账务处理上需设置“备用金”账户核算。 ( )

一只草履虫一天大约能吃掉多少个细菌（）

A.40

B.400

C.4000

D.40000

关于桥梁防寒、防凌工作，下面叙述正确的是（）。

A.在桥梁上游不少于30m范围内开凿多道纵横冰沟

B.在桥梁下游不少于100m范围内开凿多道纵横冰沟

C.在冰层开始移动前，应将实体墩台周围的一部分冰层破开

D.在冰层开始移动前，应将墩台10m范围内的冰层破开