172.The people at the party were worried about Janet because no one was aware __________ she had gon
题目
172.The people at the party were worried about Janet because no one was aware __________ she had gone.
A) about where B) of where C) of the place where D) about the place where
答案是B查了好多还是不明白 C哪里不对
答案
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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