We'll have a( )holiday.What about going to the West Lake?
题目
We'll have a( )holiday.What about going to the West Lake?
A.two days B.two-day C.two-days D.two-days' 一定要说原因哦~
答案
B 表示 2天的假期用 two-day holiday,或：two days' holiday
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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