A bold reef is a reef().
A、with part of it extending above the water
B、that can be detected by water turbulence
C、that drops off sharply
D、perpendicular to the current
A、with part of it extending above the water
B、that can be detected by water turbulence
C、that drops off sharply
D、perpendicular to the current
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A、the shore is bluff and rocky B、of offshore exposed rocks C、submerged reefs cause prominent breakers D、the lookout tower is marked with radar reflectors
A、a hard sand shoal marked with a light B、completely submerged at all stages of the tide C、surrounded by rocks awash at low water spring tides D、a small,low,sandy islet surrounded by shoal water