单项选择题
A.the after one is more than forward one B.the forward one is more than after one C.the forward one is the same with after one D.it depends on the type of engine
When sailing in cold zones, the（） should be drained of ...
单项选择题When sailing in cold zones, the（） should be drained of water.
A.the ventilation pipe B.the water line for fire fighting on the deck C.the fuel oil line D.the water supplying line in bath room
When sailing in cold zones, the（） should be heated.A.th...
单项选择题When sailing in cold zones, the（） should be heated.
A.the steering gear room B.the fire fighting pipe line C.the fuel oil tank D.the bath room
When the ships is going to enter into the harbor,（）.A.c...
单项选择题When the ships is going to enter into the harbor,（）.
A.change from diesel oil to heavy fuel oil for mail engine B.pump out bilge water C.change sea chest form lower level one to high level one D.test emergency generator
