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
参考答案:B, D
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.
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