[如何进行英语教学有效反馈]课堂教学侧重教学目标、教学内容、教学过程、教学方法与教学手段、教学情感的五优化 .教学过程是一个系统，教师必须对参与这个系统的各个要素进行优化的组合，以求得最 佳的教...+阅读
Environmental problems are becoming more and more serious all over the world. With the development of industry and agriculture, cars make great noises and give off poisonous gas. Trees on the hills have been cut down,and waste water is being poured continuously into rivers. Furthermore,wherever we go today carelessly disposed. The whole ecological balance of the earth is changing. Massive destruction of environment has brought about negative effects and even poses a great threat to man's existence.
We must face the situation that exists and take actions to solve our environmental problems. For instance, new laws must be passed to place strict control over industrial pollution, the pub!ic must receive the education about the hazard of pollution and so on. We hope that all these measures
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