On the table she found a piece of paper________some puzzling secret codes.
题目
On the table she found a piece of paper________some puzzling secret codes.
A．which was written B．that was written
C．on which were written D．on that was written
说有倒装,可是这倒装怎么看的?
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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