英语作文中国梦
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英语作文中国梦
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My Chinese Dream When someone asks me: What is your Chinese dream? I will answer it without any hesitation: to be a good doctor. The reason why I want to be a doctor is that I want to save people’s l...
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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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