I took p--- of the Great Wall.The guide there was very f--- to us
题目
I took p--- of the Great Wall.The guide there was very f--- to us
I like Beijing Duck b--- .这三个横线分别填什么
答案
I took （pictures或者photos)of the Great Wall
The guide there was very (friendly) to us
I like Beijing Duck (best).
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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