求一篇有关于,怎样保持健康的英语作文.
题目
求一篇有关于,怎样保持健康的英语作文.
答案
The Way to Keep HealthyIt's important for us to be healthy all our life.We can't study or work well without healthy body.There're many ways to keep healthy. First of all, we should keep taking exercis...
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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