船舶的舱容系数是指（）。
A.每吨货物所占舱容
B.每一总载重吨所占的货舱容积
C.每立方米货舱容积所能装载货物的重量
D.以上都不对
参考答案：D
This has been my life. I have found it worth living, and ____ it gladly again if I _____ the chance.
A．would live; had
B．had lived; have had
C．have lived; had
D．would live; had had
如图所示，闭合导线框的质量可忽略不计，将它从图示位置匀速拉出匀强磁场，若第一次用0.3s 时间拉出，外力做的功为W1，通过导线截面的电荷量为q1；若第二次用0.9s 时间拉出，外力做的功为W2，通过图导线截面的电荷量为q2，则
A．W1>W2，q1＝q2
B．W1>W2，q1<q2
C．W1<W2，q1<q2
D．W1>W2，q1>q2
