体积为0.2m3的实心铁块浸没水中,求:铁块受到的浮力(g=10N/kg)
2000N
I don’t like those big cities which have got ____ people and ____ traffic.
A.too much; too many
B.many too; too much
C.too many; too much
D.too many; much too
SL-450水龙头有()轴承
A、2
B、3
C、4
D、5