传染病潜伏期的意义有（）
A.判断预后
B.确定检疫期
C.协助治疗
D.协助诊断
E.确定病程长短
参考答案：B, D
3位老师带领着23名学生去郊游，每顶帐篷最多只能住6人，至少要搭几顶帐篷？
Once she has ______nothing can change it, Finally, I had to______.
A．made up his mind ; give up
B．make up her mind ; give out
C．made up her mind ; give in
D．make up his mind ; give off
