 | 呵呵~~
我現在正在做化學功課，
不知你們懂不懂呢？
1. Write a magazine article about expanded polystyrene with the following guidelines:
(i) How to manufacture expanded polystytene from polystyrene.
(ii) Expanded polystyrene made before 1990 would destroy the ozone layer, why?
(iii) What are the harmful effects caused by the destruction ofozone layer?
(iv) Expanded polystyrene made nowadays usually would not bring any harmful effect to the ozone layer, why?
(v) Besides destroying the ozone layer, what are the other problems of using large amount of expanded polystyrene?
(vi) Which countries / cities are prohibited from using expanded polystyrene as lunch box?
(vii) State any new discovery to you.
2. State the web site you have searched in the internet.
3. Give an attractive or interesting title for your magazine article.
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狗仔卡
發表於 2010-2-17 16:09:53
