单项选择题
Which of the following statements is correct concerning the viscosity of lubricating oil?（）
A.Viscosity will increase as temperature increases B.Viscosity is a measure of a fluid s internal resistance to flow C.Viscosity will decrease as temperature decreases D.Viscosity is not dependent on temperature
单项选择题 Under normal operating conditions, the rudder is hydraulically locked unless （）.
单项选择题 Saltwater is typically provided to a refrigeration system to （）.
单项选择题 Which of the listed operations will cause an automatically controlled refrigeration compressor to restart?（）
