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问题 多项选择题

工作交往中，介绍是人与人相互接触与了解的开始。一般来说，介绍的方式主要有（）。

A.可以用地方方言来介绍

B.自我介绍

C.用普通话来介绍

D.通过中介者的介绍

答案

参考答案：B, D

完形填空

Cell phones are so cheap that almost all people can afford it. _____ you go, you can see people holding cell phones doing different things. Our life style has changed greatly  _____ of the widespread of mobile phones.

Mobile phones change _____ way we contact others. In the past, we contacted our families, relatives and friends by writing letters _____ just going to a certain area to make a phone call. Now, if we want to contact them, all we need to do is to take out our cell phone, dial the number and then we can reach _____ in a minute.

With a cell phone, we _____ take photos and locate ourselves easily. All cell phones have a camera function. We can take photos anywhere we want and do _____ need to take our camera. Besides, _____ we are lost, we can use a cell phone to locate ourselves and find the right direction.
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单项选择题

爆破片是一种在较高压力下即发生（）而排放介质的安全泄压装置。

A．穿孔

B．爆炸

C．断裂

D．变形
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