英语作文 Talk about playing computer games
题目
英语作文 Talk about playing computer games
答案
Computer games are very popular with young people,but they are also controversial.For example,opponents argue that they are harmful to brain development,cause children to neglect reading and encourage...
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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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