Air pollution comes second. Factories and moving vehicles are constantly giving off smoke and harmful gases.There is no way to get fresh air except to go out of the city on weekends or holidays.If the weather is bad,you，ll find the whole city overcast with smog.As a result,pollution induced diseases are now a common occurrence. However,noise and violence are to be found in every big city and the situation seems to get worse year by year. In short,life in big cities is rather unnatural and unhealthy.To me,it is silly of people to choose to live in big cities. 温馨提示：通过阅读全文，不难看出短文中每一段的首句即为该段的中心思想。将每一段段落大意放在一起，在稍作修改后便可以作为这篇短文的概括。 现在，请你写出该文摘要。 ________________________________________________________________________________________________________________________________________________________________________________________________  答案点拨： 摘要初稿:Although big cities provide people with many〖J conveniences,they certainly have their own disadvantages.Traffic is the first and often most serious problem.Air pollution comes second.However,noise and violence are to be found in every big city and the situation seems to get worse year by year.In short,life in big cities is rather unnatural and unhealthy.(60 words) 修改后:In spite of their conveniences,big cities have many disadvantages,such as traffic,air pollution,noise and violence,which makes living in big cities unhealthy and unsafe.(27 words) 祝 您 高考总复习·人教版·英语 选修 8 Unit 1

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