单项选择题
In an automatic mooring winches, the wire is paid off the barrel at（） a tension and is recovered at（）tension.
A.lower；igher B.maximum；higher C.predetermined minimum；higher D.predetermined maximum；lower
单项选择题 When the power is shut off, the wire（）
单项选择题 For a flash type evaporator, a demister is located the condenser（）
单项选择题 For a flash type evaporator, the seawater heater will have to maintain a enough temperature to minimize scale formation（）
