求教1道选择题:The teacher asked us ( ) .A.B.C.D.-----谢谢!
题目
求教1道选择题:The teacher asked us ( ) .A.B.C.D.-----谢谢!
The teacher asked us ( ) .
A.whose hat was this B.whose hat this was C.whose hat is this D.whose hat this is
求教!
答案
选B
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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