the river becomes ()because the paper factory pours waste water into it
题目
the river becomes ()because the paper factory pours waste water into it
九下英语作业本
答案
The river becomes polluted because the paper factory pours waste water into it.
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．
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