【单选题】如果从不包括大小王的52张扑克牌中随机抽取一张,那么取到红色的概率是( )。
【单选题】Mary doesn’t want to work right away because she thinks that if she ____ a job she probably wouldn’t be able to see her boy friends very often.
【单选题】当ωt=360°时,i1、i2、i3分别为
【简答题】如果从不包括大小王的52张扑克牌中随机抽取一张,那么取到红心(事件A)的概率是 ,取到方块(事件B)的概率是 ,问: (1)取到红色牌(事件C)的概率是多少? (2)取到黑色牌(事件D)的概率是多少?
【单选题】如果从不包括大小王的52张扑克牌中随机抽取一张,那 么 取到红心(事件A)的概率是1/4,取到方块(事件 B)的概率是1/4。问: (1)取到红色牌(事件C)的概率是多少? (2)取到黑色牌(事件D)的概率是多少?
【简答题】Mary: John, I heard you have been keeping (1) ___________________ for many years. I feel like getting a pet, but I’m not sure which animal would be suitable. Could you give me (2) ___________________?...
【单选题】当ωt=360°时,i1、i2、i3分别为()。
【单选题】Mary doesn’t want to work right away because she thinks that if she ____ a job she probably wouldn’t be able to see her boy friends very often.