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问题 问答题 简答题

煤尘是怎样产生的？它有什么危害？

答案

参考答案：

在采掘工作面中的打眼爆破、采煤机割煤等生产环节产生的煤尘量最高，其次是装煤、运煤及运输系统的转载点等处都是产生煤尘的地点。

危害：一是爆炸二是职业病。

单项选择题

开启含感染性材料安瓿瓶，最好（）。

A、用烧红的玻璃棒接触安瓿瓶的上端使之破碎

B、用硬物敲打安瓿瓶的上端使之破碎
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单项选择题

Industrial pollution is not only a problem for the countries of Europe and North America but also an extremely serious problem in some developing countries. For these countries, economic growth is a very important aim. They want to introduce industries, and so they put few controls on the industries which cause pollution.
Cubatao, an industrial town of 85 000 people in Brazil, is an example of the connection between industrial development and pollution. In 1954, Cubatao had no industry. Today it has more than twenty large factories, which produce many pollutants. The people of the town are suffering from the poisonous matter in their environment and the bad effects can be clearly seen. Birth shortcomings are extremely common. Among children and adults, lung problems are sometimes twelve times more common in Cubatao than in other places.
It is true that Brazil, like many other countries, has laws against pollution, but these laws are not enforced strictly enough. It is cheaper for companies to take no notice of the laws and pay the fines than to buy the expensive equipment that will reduce the pollution. It is clear, therefore, that economic growth is more important to the government than to the health of the workers. However, the responsibility does not completely lie with the Brazilian government. The example of Cubatao shows that international companies are not acting in a responsible way either. A number of the factories in the town are owned by large companies from France, Italy, and the US. They are doing things in Brazil that they would not be able to do at home. If they caused the same amount of pollution at home, they would be severely punished or even put out of business.

Why don’t developing countries have strict pollution controls

A. The new industries they want to introduce do not cause much pollution.
B. Pollution is not a serious problem for developing countries.
C. They don’t realize the balance of nature will be destroyed by some pollutants.
D. If they put stricter controls on industry, fewer companies would build new plants in developing countries.
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