英语作文How to keep healthy60字
题目
英语作文How to keep healthy60字
答案
How to keep healthyIt's important for us to keep healthy.I think we should have a healthy diet every day .We should eat more fruit and vegetables instead of junk food.We'd better get up early in the 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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