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單項(xiàng)選擇題

Stations in the United States of America are grouped by states arranged in the alphabetical order of their（）.

A.countries
B.states
C.names
D.groups

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單項(xiàng)選擇題

At least（）two-way VHF radiotelephone apparatus shall be provided on every cargo ship of 300 tons gross tonnage and upwards but less than 500 tons gross tonnage.

A.one
B.two
C.three
D.four

單項(xiàng)選擇題

Every lifeboat which is fitted with a fixed two-way VHF radiotelephone apparatus with（）which is separately mounted shall be provided with arrangements for sitting and securing the antenna effectively in is operating position.

A.a dummy antenna
B.a supporting facilities
C.a back-up equipment
D.an antenna

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