a good heart 求关于好人好事的英语文章
题目
a good heart 求关于好人好事的英语文章
答案
Helping each other is we the traditional virtues of the Chinese nation,we should always maintain a good state of mind to meet things,for example,helped the old man,help the disabled to cross the road,in the school to help students have difficulty in learning,only keep a helping each other heart society a better place.
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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