单项选择题
In a refrigeration system, if the cooling water to the condenser fails, the（）.
A.box temperature solenoid valve will close B.expansion valve will close C.compressor will shutdown D.king valve will open
单项选择题 Accidental flooding of the engine room bilges by the bilge main is prevented by （）.
单项选择题 Zinc rods are installed in the refrigeration system （）.
单项选择题 （）is a series of trials done at sea to determine whether the ship has met the specifications of design, modification, or repair.
