设A,B,C为三个随机事件 ,且P(A)=P(B)=P(C)=1/4,P(AB)=0,P(AC)=P(BC)=1/12,则A,B,C中恰有一个事件发生的概率为()
D
Thefloordoesnotlooksobadwhen________(sweep)clean.
Hardlyhadhefinishedhisspeech________theaudiencestartedcheering.
Ipreferthisdiagram________thatone.
Iknowitisn’timportantbutIcan’thelp________aboutit.
Ifyouwanttofindadecentlocationforyourownhome,________Mr.Smithforadvice.