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單項選擇題

The present voyage of my ship began at the port of Shanghai after loading 8 000 tons of Cargo on board and ended after discharging the Cargo at the port of Hong Kong，which was（）.

A.the port of destination
B.the next port of call
C.the port of arrival
D.the last port of call

單項選擇題

The height of a VHF radio antenna is more important than the power output wattage of the radio because（）.

A.VHF communications are basically line of sight
B.the air is more dense the higher you go
C.salt water is a poor conductor of sound
D.sea water absorbs the radiated energy