谁有 in america some people say they have an answer to the problems of car crowding and pollution.的全文
题目
谁有 in america some people say they have an answer to the problems of car crowding and pollution.的全文
答案
In America some people say they have an answer to the problems of car crowding and pollution.In many cities,hundreds of people ride bikes to work every day.In New York,some bike riders have even made ...
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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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