大学英语课后作文答案(新世纪综合教程4).doc

大学英语课后作文答案(新世纪综合教程4).doc

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大学英语课后作文答案(新世纪综合教程4)

大学英语课后作文答案(新世纪综合教程4) BOOK 4 Unit 1 My Understanding of Environmental Protection Man and the environment are closely related. Man relies on the environment for water, food and shelter. A harmonious relationship between man and the environment is essential for human survival on the earth. However, man and the environment have never been on such bad terms as they are now. As society develops, mans transformation of nature has severely polluted his living environment. Deforestation leads to changes in rainfall patterns, causing devastating floods, droughts and sandstorms. The discharge of chemical pollutants endangers our health and the lives of other beings. And mass production has resulted in the shortage of irreplaceable natural resources such as coal and oil. If we take no immediate and effective steps to protect our environment, human beings may be the next species to become extinct. We should do our best to protect our environment by planting more trees, taking care of wildlife, reducing industrial wastes, using renewable energy, and imposing heavy fines on environmentally-unfriendly activities, so as to preserve the environment for future generations. Unit 2 The Impact of the Mobile Phone on Peoples Lives Among the many technological inventions, the mobile phone impresses me most. The mobile phone brings considerable convenience to our lives. It not only enables us to keep in touch with each other almost anytime and anywhere but also helps us solve problems or do business efficiently. In emergencies, a mobile phone can even be a life-saver. Besides, its multi-functions add ease and color to our lives. With a mobile phone, we can receive mail, read news, listen to music, play games, and take pictures. Yet, the mobile phone has its disadvantages, too. Most of us have experienced the nuisance of unwanted or wrong calls. We are inconvenienced by calls on occasions when we least expect one. Besides, the technology infrastructure to support mobi

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