The officer in charge of the engineering watch shall continue to be responsible for machinery operations, （）the presence of the chief engineer in the machinery space.

We have stayed at Shanghai port for a long timeThe foul...

单项选择题We have stayed at Shanghai port for a long timeThe fouling on the ship’s hull greatly increases her （）.

We’d better （）economic speed （）fuel consumption.A.take；...

单项选择题We’d better （）economic speed （）fuel consumption.

This machine （）out of order very often, but now it work...

单项选择题This machine （）out of order very often, but now it works well.