()are mainly caused by the gravitational pull of the moon.
A、Tides
B、Sea
C、Swell
D、Wind
A、Tides
B、Sea
C、Swell
D、Wind
A、oil leakage in engine-room B、hot work (welding, cutting, etc) C、static electricity D、all of the above
A、The main cause was big power struggle for control of the world. B、It was the worldwide economic crisis. C、It was the military expansion of Japan,and Germany.
A、large dirt particles in the oil supply B、insufficient lubricating oil and overheating C、normal wear D、water contamination of the lube oil
A、cause an alarm condition B、secure power to the indicator C、secure power to the monitored device D、automatically recluse within 10 seconds
A、Owners are to be responsible for loss or damage even such loss or damage is not caused by the improper stowage B、Owners are only responsible for the loss or damage or delay caused by improper or negligent stowage C、Both A and B are right D、Both A and B are wrong
A、A.metal particles loosened by wear B、B.air when no air cleaners are used C、C.condensation of water vapors D、D.breakdown of the lubricating oil by dilution