速求accident around us 英语作文60到80词
题目
速求accident around us 英语作文60到80词
答案
There are always accidents of all kinds around us,though most of us don't realize it.While reading the everyday newspaper,we tend to ignore the tragedy since this kind thing looms into our eyes all th...
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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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