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问题 填空题

根据“性质决定用途，用途体现性质”回答下列问题。

（1）浓硫酸有吸水性，在实验室中常用它做某些气体的__________；

（2）氮气常用作保护气，体现了氮气的化学性质___________；

（3）用稀盐酸除水垢时，盐酸跟水垢中碳酸钙反应的化学方程式为________________。

答案

（1）干燥剂

（2）稳定或不活泼

（3）CaCO3+2HCl==CaCl2+H2O+CO2↑

阅读理解

任务型阅读

Pollution problems are becoming more and more serious. One of them is called “white pollutions” caused by plastic, such as shopping bags, boxes and cups. In China, about three billion plastic shopping bags are used every day, which results in a great waste of resources(资源) and heavy environment pollution. Luckily, the government has stopped us from using free plastic bags, telling all stores and supermarket not to provide customers(顾客) with free plastic bags since June 1,2008. From then on, people have been supposed to use cloth bags and shopping baskets instead of plastic bags in order to protect our environment.

Now, more and more people have realized the importance of using the cloth bags and shopping baskets. For one thing it can protect our environment, for another it can also save energy. Yet we have more things to do to solve the problem of “white pollution”!

小题1:Is “white pollution” caused by plastic?

__________________________________________

小题2:How many plastic shopping bags are used every day in China?

_____________________________________________

小题3:What are the advantages of using cloth bags or shopping baskets？

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单项选择题

下列哪个机关不可以向赔偿请求人收取任何费用（）

A.鉴定机关

B.审计机关

C.勘验机关

D.赔偿义务机关
查看答案