what do you think the effects of exercise are?英语作文100词左右.
题目
what do you think the effects of exercise are?英语作文100词左右.
答案
Outdoor activities,there are two main benefits of the sun.First,many activities is a form of anaerobic exercise,that does not require oxygen to the body's metabolism will use to provide additional,sho...
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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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