求翻译 快点!又追加分
题目
求翻译 快点!又追加分
There are still many problems of environmental protection in recent years. One of the most serious problems is the serious pollution of air, water and soil. the polluted air does great harm to people’s health. The polluted water causes diseases and death. What is more, vegetation had been greatly reduced with the rapid growth of modern cities.
谢谢
答案
近些年仍存在大量环境保护问题.其中最严重的问题之一就是空气污染,水污染,以及土壤污染.空气污染严重危害人体健康.水污染致人感染疾病甚至死亡.更为严重的是,城市化的快速发展使植被大量减少.
举一反三
已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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