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()
Whenhesuddenly________upthesubjectofgeneticengineering,therewasanembarrassedsilence.
社会主义革命的目的是为了______。
Itisestimatedthat,currently,about50,000speciesbecome_____everyyear.
You________gonow.It’sgettinglate.
Iwishyou________likethat.
Thedestructionofthetwintowers_________shockandangerthroughouttheworld.
Idon'tknowhowwecanmake________onthetimetableforanymorecourses.
Iboughtthiseighteenthcenturywritingdeskataquite________price.
Let'sdrink_______Dicks'successinbusiness.