施工成本的过程控制中,人工费的控制实行()方法
A.量化管理
B.量价分离
C.弹性管理
D.指标包干
参考答案:B
He hasn't seen his mother for five years. He is ______ forward ______ his mother at once. [ ]
A. look; to see
B. look; to seeing
C. looking; to seeing
将边长为10cm的正方体木块平放在圆柱形容器的底部,圆柱形容器的横截面积为300cm2,现缓慢地往容器中注水,当容器中的水面升至8cm时,木块对容器底面的压力恰好为零,g取10N/kg.求
(1)注入水的质量是多少?
(2)木块的密度是多大?