比较大小:-|-18|______-(-18).
∵-|-18|=-18,-(-18)=18,
∴-|-18|<-(-18).
故答案为:<.
——Did you stay up very late last night?
——No,It was not 10 o’clock yet ____I went to bed.
A.when
B.until
C.that
D.while
固定端约束反力为两种分量,即一个力和一个()。