A V-shaped ripple with the point of the V pointing upstream in a river may indicate a _____.A.submerged rock, not dangerous to navigationB.broken wreck, not dangerous to navigationC.towed-under buoyD.All of the above
A V-shaped ripple with the point of the V pointing upstream in a river may indicate a _____.
A.submerged rock, not dangerous to navigation
B.broken wreck, not dangerous to navigation
C.towed-under buoy
D.All of the above
相关考题：
The charts show two dashed lines crossing the river justsouth of St. Catherine Bar Light. What does this indicate?A.Overhead power linesB.Louisiana-Mississippi ferry crossingsC.Two railroad trestlesD.Two submerged oil pipelines
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单选题The controlling depth of the river is（）.Athe minimum depth of the river prescribed in the channel maintenance programBthe edge of a dredged channelCthe highest level to which the river may rise without floodingDthe least available water in a channel which limits the draft of boats and tows
单选题A V-shaped ripple with the point of the V pointing upstream in a river may indicate a（）.Asubmerged rock，not dangerous to navigationBsunken wreck，not dangerous to navigationCtowed-under buoyDAll of the above
单选题On a Cisco Aironet 1130AG Series standalone access point，the status LED is dark blue andblinking. What does this indicate？（）AThe access point is booting.BThe internal radio has failed.CAn access point buffer overflow is occurring.DA firmware upgrade is in progress.
单选题On a cisco aironet 1130 series autonomous access point， the status indicator is blinking dark blue. What does this indicate？（）Athe access point is booting. Ba firmware upgrade is in progress. Cthe internal radio has failed. Dan access point buffer overflow is occurring.
单选题The charts show two dashed lines crossing the river justsouth of St. Catherine Bar Light. What does this indicate? （）AOverhead power linesBLouisiana-Mississippi ferry crossingsCTwo railroad trestlesDTwo submerged oil pipelines
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