A.weighing it
B.it weighs
C.its weight
D.it is weighed
A、it is weighed
B、weighing it
C、its weight
D、it weighs
A.a greater amount offluoride
B.a higher percentage filler content by volume
C.a smaller average filler particle size
D.a broader range of shades
A.700sinωtV
B.500sinωtV
C.100sinωtV
B.Tiring; to watch TV
C.Tired; watching TV
D.Tiring; watching TV