the proper ways for students to relax
题目
the proper ways for students to relax
英语作文70字左右初2水平
答案
As China's people's material and cultural standard of living improve, piano instrument that has spread to the millions of households, many children have started learning the piano. Followed, in the pi...
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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