different people differient hobbies 写一篇作文
题目
different people differient hobbies 写一篇作文
答案
Different people may have different hobbies.Some people like playing computer games.Some likes playing chess and cards.Some likes collecting stamps and coins.
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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