单项选择题
A.Feed-water heater internal tube surfaces
B.Internal distillate cooler tubes
C.Flash chamber vertical surfaces
D.Distilling condenser tubes
单项选择题 Machinery operating features are designed to help conserve energy.Which of the following results will not contribute to energy conservation?（）
单项选择题 A refrigerant with oil in solution has a （）.
单项选择题 Which of the following terms would best describe the temperature at which a liquid boils at a given pressure?（）