I would take a guess at( )I thought was the co
题目
I would take a guess at( )I thought was the co
I would take a guess at( )I thought was the correct answer.括号里是该填what还是that?
答案
what
本句明显at后没介词宾语,后面的从句也没宾语,故填what作双重成分.
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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