一篇英语作文《my family》
题目
一篇英语作文《my family》
答案
My family lives in ShenZhen.There are four people in my family.They are my father,my mother,my sister and I.My father is tall and thin.He is a handsome man.He has big eyes.His hair is straight.He like...
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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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