She ___ on her way to school,I just phoned her home and no one answered me
题目
She ___ on her way to school,I just phoned her home and no one answered me
a、should be
b、must have been
c、must have rained
d、had to rain
答案
b
她刚刚一定在去学校的路上
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