单项选择题
When stand-by before sailing, the duty engineer and officer should check clock, engine telegraph and rudder, and then write it in the （）
A.engine room logbook B.voyage logbook C.engine room logbook or voyage logbook D.engine room logbook and voyage logbook
单项选择题 （） is (are) not power supplied by main switchboard directly.
单项选择题 （）is power supplied by main switchboard directly not through sub-board.
单项选择题 （）are located on the road panel of main switchboard.
