几句话的英语故事
题目
几句话的英语故事
答案
a little girl sold matches to get money on a cold day.but nobody bought them,she was nearly frozen because she was too poor to buy warm clothes.Finally,she died.
【2】
one car came,one car go.two cars pingping,one car die.
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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