what shoud you do when in the college ,中英文都要
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what shoud you do when in the college ,中英文都要
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First, your question should be: How to speak good English? But it doesn't matter if you make some mistakes when you speak English, as long as what you say can make sense to others. Practice makes perf...
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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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