改为被动语态2You must take good care of the children3when did you hear her sing this song
题目
改为被动语态2You must take good care of the children3when did you hear her sing this song
答案
the children should be well taken of by you.
when her song was heard by you?
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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