单项选择题
The amount of heat released by steam when it changes to water at the same temperature is called（）.
A.latent heat of condensation B.latent heat of vaporization C.latent heat of saturation D.sensible heat of condensation
单项选择题 Latent heat changes the （） of water.
单项选择题 （） will be used to blow away the combustion products from the tube surfaces.
单项选择题 In motor ship, （） is often used to recover some of the heat carried in the exhaust gases from the main engine.
