单项选择题
The purpose of engine stand-by is that （）
A.the main engine in the stand-by condition B.auxiliary machinery in the stand-by condition C.dynamical equipments in the stand-by condition and could be used immediately D.A and B
单项选择题 Which is false about engine trials?（）
单项选择题 Which of the following is false?（）
单项选择题 When the ship in the condition of stand-by and engine trials, usually put the engine telegraph in the （） position.
