It was three months before her parents found _______ she had been going out with Peter.
查看答案
He picked up the newspaper and stared _________ the headline(标题).
Where in the world were you when I was struggling _______ my life?
She's still _______ work. I'll ask her to call you when she gets home.
若f(x)在[a,b]上连续，则在(a,b)内必有()
A. 导函数
B. 最大值与最小值
C. 极值
D. 原函数
微信支付 
支付宝支付