how many cars did the wokers in this factory make in 2004?把它改为被动语态
题目
how many cars did the wokers in this factory make in 2004?把它改为被动语态
答案
How many cars were made by the workers in this factory in 2004?
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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