谁能帮我写一篇“how to help others”的 作文要立刻
题目
谁能帮我写一篇“how to help others”的 作文要立刻
答案
As one child ,as well as we need love and help ,we should give love and help to others ,To help others mean to help ourselves.In our-daily lives ,we may come across so many difficulities ,Because we d...
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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