翻译（There were a lot of cars)(Hs made cakes)(Lots of people go by taxi)
题目
翻译（There were a lot of cars)(Hs made cakes)(Lots of people go by taxi)
答案
那里曾经有许多小轿车
他做了一些蛋糕
许多人出巡乘出租车
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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