急需要一个英语作文题目(我的好朋友)简单的三四行就行
题目
急需要一个英语作文题目(我的好朋友)简单的三四行就行
答案
I have a good friend named John.He is very tall and he is good at basketball.He likes playing,but he doesn't like studying.He knows a lot of things that our textbooks don't tell us.When we are togethe...
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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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