以How can we study English 为主体的英语作文 急用
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以How can we study English 为主体的英语作文 急用
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How can we study EnglishSpeak Without Fear.The biggest problem most people face in learning a new language is their own fear. They worry that they won’t say things correctly or that they will look s...
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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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