where did you go for your vacation ?where did you go on your vacation?哪个是对的?
题目
where did you go for your vacation ?where did you go on your vacation?哪个是对的?
答案
都对
where did you go for your vacation 你去哪度假了?
where did you go on your vacation?假期你去过哪?
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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