I have cities but there are not any house in them .I have forest,but not any trees in them.I have
题目
I have cities but there are not any house in them .I have forest,but not any trees in them.I have
I have cities but there are not any house in them .I have forest,but not any trees in them.I have rivers,but there is not ang water in them.( )
A Picture B Map C Photo D Book
答案
地图啊
有城市但是没有房子
有树林却没有树 很明显地图
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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