【单选题】真分数模型 X=T+E 中, E 表示的是
【简答题】已知函数 . (1)求函数 的极值点与极值; (2)设 为 的导函数,若对于任意 ,且 , 恒成立,求实数 的取值范围.
【简答题】阅读理解。 It's good to share your feelings with others. No matter whether your feelings are good or not, it can also help you to get closer to people who you care about and who care about you. But how to ...
【简答题】(本小题满分12分) 设函数 . (Ⅰ)若曲线 在点 处与直线 相切,求 的值; (Ⅱ)求函数 的极值点与极值.
【多选题】亚硝酸盐在肉制品中使用时,其作用主要有:
【单选题】听力原文:W: Hi, Jack. It's good to see you again. Are you ready to get down to business again after spring break? M: Not really, but I guess I don't really have too much choice, do I? And it's going to be...
A.
Just before a vacation.
B.
Just after the end of a school semester.
C.
At the end of the summer.
D.
Just after a break from school.