1. [单选题]If a refrigeration system were short of refrigerant, the condition would result in
A. continuous running of the compressor
B. high suction pressure
C. high discharge pressure
D. short cycling of the compressor on the water failure switch
2. [单选题]应急消防泵的任何才有驱动力源(driving force source)应能在温度降至0℃时的冷态下用______曲柄启动。如该启动不可行，则主管机关可允许其他启动方式。
A. 启动空气
B. 电力
C. 液力
D. 人工（手摇）
3. [单选题]救生浮具的配备主要在工类航区航引的客船上配置，按船员和旅客总数配置？
A. 2%
B. 3%
C. 4%
D. 5%
