My Friend英语作文 (要短的)
题目
My Friend英语作文 (要短的)
答案
I have a good friend ,he has a small mouth and big eyes .he is friendly to others ,I like staying
with him .his name is John.he is taller than me ,he is thinner than me.he always reads books to
study .he is more active .Do you know him?
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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