There is a fire in the crew’s quarters of your vessel. You should（）.

A.ventilate the quarters as much as possible

B.prepare to abandon ship

C.close all ventilation to the quarters if possible

D.attempt to put the fire out yourself before sounding the alarm

运输企业的运输产品价值量由运输成本和（）构成。

A．运输收入

B．盈利

C．运输价格

D．运输消耗