【单选题】设 X~N(1,4) ,且 Φ(0.3)=0.6179, Φ(0.5)=0.6915 ,则 P(0 = ( )
【单选题】假定变量Z服从标准正态分布,则有关上α分位点下列陈述正确的是()。
【单选题】听力原文:W: You can either go with me or you can stay here at the apartment. Which would you rather do? M: If you don't care, I think I'd rather catch up on my sleep. I really don't see what I could do in...
A.
Stay up and go for the meeting.
B.
Stay at the apartment and sleep for a while.
C.
Catch up with the woman after he wakes up.
D.
Go with the woman for fear of oversleeping.
【简答题】唐时王维、李白、白居易等许多著名诗人为( )古琴琴乐写下了不朽诗篇。 唐诗吟唱 李白 《关上月》 白居易的 《长相思》 为吟唱表演创作特征 。
【判断题】任何情况下,眼的折光体系的后主焦点都是正好位于视网膜上。
【单选题】设 X~N(1,4) ,且 Φ(0.3)=0.6179, Φ(0.5)=0.6915 ,则 P(0