题型:名词解释 潜水艇的体积为100m3,质量为6×104kg.如果使它悬浮在海中某处,它的上表面距海面20m,已知海水的密度为1.03×103kg/m3,g取10N/kg.求:(1)它上表面受到海水的压强大小.(2)此时水舱中充入海水的质量. 查看答案
题型:名词解释 Not having promoted the new digital camera successfully, the company should ________ its original marketing methods.A.account forB.reflect onC.work outD.call up 查看答案