【单选题】
According to the customs of this port,the work of opening and closing hatch covers is done by ().
A、the ship's officers
B、the foreman from the shore
C、the ship's hands
D、the tally man
A、the ship's officers
B、the foreman from the shore
C、the ship's hands
D、the tally man
A、be treated according to the C-Es command exactly B、be treated according to MARPOL C、accumulate in bilges or on tank tops in accordance with MARPOL D、discharge to sea at the specified areas
A、they are used B、the field windings are connected to the load C、the armature circuit is connected to the load D、the field windings are connected to the armature circuit