单项选择题

Zinc rods are installed in the refrigeration system （）.

A.liquid strainer
B.liquid receiver
C.saltwater condenser
D.evaporator

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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.

A.SEA WORTHINESS
B.SEA TRIALS
C.TRIAL-AND-ERROR
D.DOCK TRIALS

单项选择题

A ship designed for carrying goods requiring refrigeration is called （）.

A.REEFER
B.RO/RO SHIP
C.CONTAINER
D.TANKER