2×8=16=4;
6÷3=2.
故答案为:4,2.
如图所示是A、B两物体的s-t图象,则
(1)前3s内A的位移为______m
(2)第3s内B的位移为______m.
. My suggestion is that Tom ______________ there on time.
A.is
B.be
C.will be
D.has been