单项选择题 Water evaporates or steam condenses at the saturation temperature, which depends upon the pressure, the higher the pressure （） the saturation temperature.

单项选择题 A （） boiler is an auxiliary boiler sometimes included in a steamships installation for supplying steam to auxiliaries in port.

单项选择题 Between the steam dram and the smaller water dram below, large numbers of smaller diameter （） tubes are fitted.