—Ellen,you drew a very nice picture today
题目
—Ellen,you drew a very nice picture today
—_____
A、No,I don‘t think so
B、That would be fine
C、That’s very kind of you to say so
D、Really?
答案
C、That’s very kind of you to say so
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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