英语作文校运会
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英语作文校运会
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Last Thursday and Friday,our school held the 40th sports meeting.It is one of the biggest activities each year in my school.All the students badly expect to it.All games in the sports meeting werevery...
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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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