Mean low water is the average height of ______.A.the surface of the seaB.high waters and low watersC.all low watersD.the lower of the two daily low tides
Mean low water is the average height of ______.
A.the surface of the sea
B.high waters and low waters
C.all low waters
D.the lower of the two daily low tides
相关考题：
According to the passage, which is true about the ocean?A. The waters of the ocean came from rain water.B. The ocean was formed from the, lighter rock materials.C. The vast single ocean formed about 200 million years ago.D. The ocean covered the whole surface of the earth at very beginning.
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The distance between the surface of the water and the tidal datum is the______．A.height of tideB.charted depthC.actual water depthD.range of tide
Clearance gauges at bridges indicate ______.A.the height of the tideB.depth of water under the bridgeC.charted vertical clearance at mean low waterD.distance from the water to low steel of the bridge
The height of a light is measured from which reference plane?A.Mean low waterB.Mean high waterC.Average water levelD.Geographical sea level
The height of tide is the ______.A.depth of water at a specific time due to tidal effectB.difference between the depth of the water and the area's tidal datumC.difference between the depth of the water and the high water tidal levelD.difference between the depth of the water at high tide and the depth of the water at low tide
The period at high or low tide during which there is no change in the height of the water is called the ______.A.range of the tideB.plane of the tideC.stand of the tideD.reversing of the tide
Charted depth is the ______.A.vertical distance from the chart sounding datum to the ocean bottom，plus the height of tideB.vertical distance from the chart sounding datum to the ocean bottomC.average height of water over a specified period of timeD.average height of all low waters at a place
The soundings on the chart are based on the depth of water available at ______.A.mean low waterB.mean lower low waterC.mean high waterD.mean high water springs
Charted depth is the ______.A.vertical distance from the tidal datum to the ocean bottom plus the height of the tideB.vertical distance from the tidal datum to the ocean bottomC.average height of water over a specified period of timeD.average height of all low waters at a place
The abbreviation L.W.R.P. on the navigation maps means ______.A.low water reference planeB.low winter runoff pointC.least water river planeD.land wall reference point
The average height of the surface of the sea for all stages of the tide over a 19 year period is called ______.A.mean high waterB.mean low waterC.half-tide levelD.mean sea level
Normal pool elevation is the height in feet of the section of river above a dam. This height is measured from ______.A.low steel on the Huey P. Long BridgeB.mean sea levelC.the local water tableD.the minimum dam control level
Mean high water is the average height of ______.A.the higher high watersB.the lower high watersC.the lower of the two daily tidesD.all high waters
What does the writer mean by saying“it is a maxim more often repeated than observed”in Line 3 to 4，Paragraph 1？( ) A.The maxim functions well in all cases B.The maxim does not function at all C.The maxim functions more at surface value D.The maxim does not work much in reality
单选题The height of a light is measured from which reference plane?（）AMean low waterBMean high waterCAverage water levelDGeographical sea level
问答题If a is an integer, is b an integer? (1) The average (arithmetic mean) of a and b is an integer. (2) The average (arithmetic mean) of a, b, and b+4 is a.
单选题The height of tide is the （）.Adepth of water at a specific time due to tidal effectBdifference between the depth of the water and the area's tidal datumCdifference between the depth of the water and the high water tidal levelDdifference between the depth of the water at high tide and the depth of the water at low tide
单选题The average height of the surface of the sea for all stages of the tide over a 19 year period is called（）.Amean high waterBmean low waterChalf-tide levelDmean sea level
单选题Clearance gauges at bridges indicate （）.Athe height of the tideBdepth of water under the bridgeCcharted vertical clearance at mean low waterDdistance from the water to low steel of the bridge
单选题Mean low water is the average height of（）.Athe surface of the seaBhigh waters and low watersCall low watersDthe lower of the two daily low tides
单选题One of the causes of ocean currents is density differences in the water. This is true because （）.Ain an area of high density the water's surface is lower than in an area of low densityBsurface water flows from an area of high density to one of low densityCthe lesser the density gradient the freer the water is to moveDit is the density differences that cause the currents to stay in the troughs
单选题The period at high or low tide during which there is no change in the height of the water is called the （）.Arange of the tideBplane of the tideCstand of the tideDreversing of the tide
单选题Charted depth is the（）.Avertical distance from the tidal datum to the ocean bottom plus the height of the tideBvertical distance from the tidal datum to the ocean bottomCaverage height of water over a specified period of timeDaverage height of all low waters at a place
单选题Charted depth is the （）.Avertical distance from the chart sounding datum to the ocean bottom，plus the height of tideBvertical distance from the chart sounding datum to the ocean bottomCaverage height of water over a specified period of timeDaverage height of all low waters at a place
单选题Mean high water is the average height of（）.AThe higher high watersBThe lower high watersCThe lower of the two daily tidesDAll high waters