n. 见证人()
A.logo
B.wareness
C.mindedness
D.witness
D、witness
A.logo
B.wareness
C.mindedness
D.witness
D、witness
A.Wa=泡水后试件质量-泡水前试筒和试件质量
B.Wa=泡水前试筒和试件质量-泡水后试筒和试件质量
C.Wa=泡水后试筒和试件质量-泡水后试筒质量
D.Wa=泡水后试筒和试件质量-泡水前试筒和试件质量
A.wa的值大于80
B.id的值大于60
C.us和sy的和始终是99和100
D.id和wa的和始终是99和100
b,试求其比值Wa:Wb。
两轮A、B分别绕通过其中心的垂直轴向同一方向转动,如题3-9图所示,角速度分别为wA=50rad·s-1,wB=200rad·s-1.已知两轮的半径与质量分别为rA=0.2m,rB=0.1m,mA=2kg,mB=4kg,两轮沿轴线方向彼此靠近而接触,试求两轮衔接后的角速度.
When she was busy tidying the room, her little kid is always ______.
A.under way
B.on the way
C.in the way
D.by the way
It is stated in the passage that men deal with emotional problems________.
A.in the same way as women
B.with tears and sadness
C.by breaking bottles into pieces
D.by using alcohol and drugs