关于青海玉树地震的英语作文
题目
关于青海玉树地震的英语作文
答案
When I heard the news that an big earthquake happened in Yushu,Qinghai Province, I was shocked.I feel very sorry for the people in the disaster area. But when I think of Wenchuan, I believe that peopl...
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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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