we have already cleaned some classroom,but there are still five of them to be cleaned请翻译一下
题目
we have already cleaned some classroom,but there are still five of them to be cleaned请翻译一下
答案
我们已经打扫了一些教室,但还有五间需要清扫.
举一反三
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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