英语作文,关于电影的,500字...
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英语作文,关于电影的,500字...
答案
the other day my brother and i went to the cinema by bicycle.my brother was riding with me sitting on the seat behind.as we came to the crossroads a young man and a girl came up and stopped us.‘we‘v...
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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