You made so many mistakes in the exam.You ___your lessons last might.
题目
You made so many mistakes in the exam.You ___your lessons last might.
A.mustn't have gone over B.needn't have gone over C.shouln't have gone over D.con't have gone over
答案
D .can't have gone over(对过去的有把握的否定推测）你昨晚肯定没有复习功课
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
最新试题
热门考点