单项选择题
What is the operating principal of a flash type evaporator?（）
A.Sea water is heated to boiling temperature under a vacuum B.Sea water is passed over heated plates in a thin film C.Heated sea water is injected into a vacuum chamber D.Sea water is forced through a heated eductor
单项选择题 What is the effect of heated intake air on a diesel engine? （）
单项选择题 What is one effect of running a diesel engine at too cool a temperature? （）
单项选择题 What is an advantage of diesel over steam turbine propulsion? （）
