§‰▲→〓@♂♀ ●★→▲♀№§Δ
A.6 B.5 C.4 D.3
参考答案:D
Mr. Li is gaining _______. He has to do some exercises to lose _______.
A.weighty…weigh
B.weight…weight
C.fat…weigh
D.weighty…heavy
如图,质地均匀粗细相同的实心圆柱体A、B放在水平地面上.已知它们的密度之比ρA:ρB=1:2,对地面的压强之比pA:pB=1:3,则高度之比hA:hB为______,质量之比mA:mB为______.