怎样避免交通事故英语作文
题目
怎样避免交通事故英语作文
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Traffic accident in our side to happen from time to tome,we should study well some knowledge to avoid traffic accidents.First,we can't red light,abide by traffic order.Secondly,tell relatives don't dr...
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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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