井下检修、搬迁电气设备时注意事项是什么？

阅读理解。

     Hundreds of years ago, life was much harder than it is today. People didn't have modern machines. There

was no modern medicine, either.

     Life today had brought new problem. One of the biggest problems is pollution. Water pollution has made

our rivers and lakes dirty. It killed our fish and a our drinking water.    b    pollution makes us talk louder and

become angry more easily. Air pollution is the most serious kinds of pollution. It's hard to all the living things

in the world.

     Cars, planes and factories all pollute our air every day, (2) sometimes the polluted air is so thick that it is

like a quilt(被子) over a city. That kind of quilt is called smog.

     Many countries are making rules to fight pollution. Factories must now clean their water before it is poured

away, they mustn't blow dirty smoke into the air.

     We need to do many other things. We can put waste things in the dustbin and not throw it on the ground.

We can go to work by bus or with our friends in the same car.(3) 如果开车的人少了,空气污染就少了.

1. 在横线上填入适当的单词.

a. ________ b. ________(每空一词)

2. 将句子(2)译成汉语.

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3. 将句子(3)译成英语.

________________________________________________________

4. 找出Dirty water must be stopped from dumping into the river.的同义句.

________________________________________________________________

5. 找出或写出能概括本文大意的句子.

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关于强制性检定，下列说法正确的是()。

A.强制检定是固定检定关系 

B.强制检定应固定检定人员 

C.强制检定实行定点定期 

D.使用单位选择检定机构 

E.强制检定是由政府计量行政主管部门强制实施

氰化物能与下列哪→种物质结合（）

A.细胞色素aa3

B.细胞色素b

C.细胞色素b

D.细胞色素c

E.细胞色素P450

治疗分化型甲状腺癌转移，碘131治疗量的确定主要根据（）。

A.甲状腺癌的转移部位

B.骨转移者碘131剂量最小

C.根据甲状腺素水平

D.有无消化性溃疡

E.肺弥漫性转移灶应高于局部肺转移

有利于急性肾炎诊断的血液生化改变是（）

A.血浆蛋白明显下降

B.血清胆固醇升高

C.抗链’O’滴度升高

D.血清免疫球蛋白升高

E.血清C₃暂时下降