Can you give ________ a call? [ ]
A. they
B. their
C. them
D. theirs
答案:C
把一质量为56g的石块,放在盛有40ml水的量筒中,水面上升到如图的位置,(g取"10N/kg")求:
(1)石块的重力
(2)石块的体积
(3)石块的密度.
(4)石块所受到的浮力.
冻藏的带骨野牛肉