The family_at the lunch table when someone came to tell them what had happened at_.
题目
The family_at the lunch table when someone came to tell them what had happened at_.
A.were sitting,Mr.Brown B.were sitting,Mr.Brown 's 请说明原因,谢谢!
答案
Mr.Brown 's=Mr.Brown 's home
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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