问题 单项选择题

(每题的备选项中,只有1个最符合题意)

某电气安装工程公司承包某化工厂电气设备安装工程。该设备主要有:能量转换设备、开关设备以及防雷设备。设备安装完毕,经检查,无质量问题,但该化工厂在正常运营一段时间后发生爆炸事故,经调查,属于内部过电压造成,于是化工厂立即采取有效措施,防止事故再次发生。

()是作用最重要、构造最复杂、功能最完善的开关电器。

A.断路器

B.熔断器

C.负荷开关

D.隔离开关

答案

参考答案:A

多项选择题
改错题

短文改错

        此题要求改正所给短文中的错误。对标有题号的每一行作出判断:如无错误,在该行下边横线上画一个勾; 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,在该行下边横线上写出该词,并也用斜线划掉。

        此行缺一个词:在缺词处加一个漏字符号,在该行下边横线上写出该加的词。

        此行错一个词:在错的词下划一横线,在该行下边横线上写出改正后的词。

        注意:原行没有错的不要改。

Dear Mayor,

     I'm a resident of the city. I feel there are much                              1.________

problems existing in the trade of taxi in our city. First of the all,          2.________

there are still not enough stops in the streets so it's not easy to

take a taxi. And they often pick out some                                         3.________

passengers without any reason. Another terrible thing which

often happens is whether deep at night taxis waiting around

the residential area  make much noise.                                              4.________

Many people suffer this inconsiderate action.                                    5.________

A friend of mine live in another city once visited me,                         6.________

and she told me our city's taxi drivers cheated her by

take a roundabout route. What will a guest                                      7.________

think of our city after such a bad experience?

I think we must make                                                                      8.________

actions to tighten control over the taxi trade.                                    9.________

Maybe the first thing we should do is to raise the taxi drivers' 

professional morality. We are looking forward  your reply.              10.________

                                                  Sincerely yours,

                                                         Li Hua