i came here by taxi and the driver charged me 50 Yuan.
题目
i came here by taxi and the driver charged me 50 Yuan.
---I came here by taxi and the driver charged me 50 Yuan.
---Really?You ___have come by bus.
A.could B.must C.may D.should应该选哪个?答案上选A,可总觉得翻译过来不对劲啊,应该选哪个啊?
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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