一篇如何度过周末的英语作文
题目
一篇如何度过周末的英语作文
答案
I had a buy weekend.On Saturday morning.I got up late.Then my mather asked me to clead the rooms.But I didn't to do anything.Then I read a book about Chinese.It was too boring.In the afternoon,I did m...
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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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