作文 How to Save
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作文 How to Save
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how to save timeWe are asked to save time in the purpose to improve efficiency.There are many ways to achieve this target.Let me take an example and show you how to do it:when you get up in the mornin...
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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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