It has cites bue no houses,it has forest but no trees,it has river but no fish.What is it?
题目
It has cites bue no houses,it has forest but no trees,it has river but no fish.What is it?
答案
是让翻译还是猜答案?翻译:有城市但是没有房屋,有森林但是没有树,有河流但是没有鱼,这是什么?如果是谜语的话,谜底我想是:maps
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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