求一篇100字左右的英语美文
题目
求一篇100字左右的英语美文
答案
My Favorite PetI have a dog.He is my favorite pet.He is very lovely.His name is Peter and he is two years old.His fur is long and white.He has big black eyes.His nose is very good.He can smell very we...
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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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