三羟酸循环的第一个限速酶是（） A.丙酮酸脱氢酶 B.顺乌酸酶 C.琥珀酸脱氢酶 D

（）是指在油气勘探开发作业和生产工艺过程中，存在或可能产生硫化氢的作业。

A.硫化氢作业

B.开发作业

C.生产作业

D.勘探作业

一种盐水中盐与水的重量比是1：100，现在要配制这种盐水8080千克，需要盐______千克，水______千克．

用所给词的适当形式填空(10分)

小题1:The meat smells ____________(terrible). Throw it away.

小题2: While Daniel ___________ (make) a snowball, he fell over.

小题3:__________ (luck), his car broke down on his way to Shanghai.

小题4:Tigers are __________ (danger) animals, we should protect them as much as possible.

小题5:The zookeeper told us ___________(not frighten) the birds.

小题6: Do you know the ___________(weigh) of the box?

小题7: My mother ____________ (mop) the floor at this time yesterday.

小题8: She is very sad because of the _________ (lose)of her lovely dog.

小题9:After walking for a long time, they felt much _________(thirsty).

小题10:Do you like to watch the _______ (feed) of animals with me this morning?

煤矿不得因从业人员对单位安全生产提出批评、检举、控告或者拒绝违章指挥、强令冒险作业而降低其工资、福利等待遇或者解除与其订立的（）。

A、劳动合同

B、协定

C、责任书

下列就购汇业务描述正确的有（）。

A、境内个人可在我行已开办售汇业务的网点办理购汇

B、境内个人年度总额之内的购汇业务不限定购汇次数

C、境内个人年度总额之内的购汇业务不限定单笔购汇金额

D、境内个人年度总额之内的购汇业务可由他人代办