我的爸爸作文50字英语作文带翻译
题目
我的爸爸作文50字英语作文带翻译
答案
My father My father is a handsome man . He is tall and medium build. He has short black hair and big eyes. My father works in a hospital. He is a doctor. He wears a uniform in the hospital. He drive...
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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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