问题 单项选择题 A1型题

可接触到铅的作业是()

A.吹玻璃

B.蓄电池制造

C.电镀

D.气压计制造

E.提炼金、银等

答案

参考答案:B

解析:接触机会(1)铅矿开采与冶炼:工业开采的铅矿主要为方铅矿(硫化铅)、碳酸铅矿(白铅矿)及硫酸铅矿。开矿时,呼吸道和消化道接触均为重要途径;(2)熔铅作业:制造铅丝、铅皮、铅管及铅丸等,制造电缆,焊接用的焊锡等均可接触铅烟、铅尘或铅蒸汽;(3)铅化合物生产与使用:铅的氧化物常用于制造蓄电池、玻璃、搪瓷等;保险丝、电子显象管的制造以及一些药物的生产等。

改错题

短文改错(共10小题,每小题1.5分,共15分)

此题要求改正所给短文中的错误。对标有题号的每行作出判断;如无错误,在该行右边横线上面一个勾(√);如有错误(每行只有一个错误),则按下列情况改正:

此行多一个词:把多余的词用斜线( / )划掉,在该行右边横线上写出该词,并也用斜线划掉。

此行缺一个词:在缺词处加一个漏字符号(∧),在该行右边横线上写出该加的词。

此行错一个词:在错的词下面划一横线,在该行右边横线上写出改正后的词。

注意:原行没有错的不要改。

It rained very hardly last summer and the little                                  44.       

stream near our house became big river.It burst                                     45.       

through the bank.The fields all round was soon full                        46.       

of water.Luckily,the water didn’t reach any of the                      47.       

house in our village.But the bursting water from the                    48.       

river carried away our wooden bridge,that was over                    49.       

three hundred of years old.We were very sorry to                                   50.       

lose the oldest thing we have had for such a                                       51.        

long time.We will build a new bridge,so it will                              52.       

not be so familiar than the one we had before!                               53.       

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