单项选择题
A.Sensitivity B.Power C.Speed droop D.Compensation
Thermostatic steam pressure reducing valves are used in...
单项选择题Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
A.double bottom fuel oil tank temperature B.heater supply steam flow C.pressure of the fuel supplied to the burners D.attemperator steam flow in the heater discharge circuit
“Insufficiency of manning or insufficiency of certifica...
单项选择题“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）
A.substandard ship B.standard ship C.over-standard ship D.reference ship
Using a file without a handle may result in （）A.your wo...
单项选择题Using a file without a handle may result in （）
A.your work becoming rounded B.injury to your hand C.overheating of the file D.pinning
