A:语言中枢
B:渴觉中枢
C:体温调节中枢
D:糖中枢
有x支球队参加篮球比赛,共比赛了21场,每两队之间都比赛一场,则下列方程中符合题意的是( )
I ________ up at five o'clock.
— Please don't ask me about this. It is none of your business.
— I don't think so. I think everyone has the right to know it.