many rural children have to live with their relatives_ of with their parents
题目
many rural children have to live with their relatives_ of with their parents
答案
instead
instead of：代替；不是…而是…；而不是；不是…
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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