编写英语作文,
题目
编写英语作文,
以“what would your friends like to help others ”编写英语作文
答案
I have many good friends.They has clever hearts.some of them likes to helps others.they said that helping people is the world's lovely0.so they helps people every week.they likes helping old people be...
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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