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单选题
The height of a light is measured from which reference plane?（）
A
Mean low water
B
Mean high water
C
Average water level
D
Geographical sea level
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考题
单选题Which statements concerning the effect of the statement gfx.drawRect（5， 5， 10， 10） are true， given that gfx is a reference to a valid Graphics object？（）A
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考题
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low steel on the Huey P. Long BridgeB
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单选题Some lights used as aids to marine navigation have a red sector to indicate a danger area. The limits of a colored sector of a light are listed in the Light List in which of the following manners?（）A
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单选题The distance from which a certain light is visible is directly proportional to the wattage of the light bulb. If the light is visible from 16 meters when a 40 watt bulb is used, from what distance is the light visible when a 75 watt bulb is used?A
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35 metersC
51 metersD
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单选题Which statement concerning Montauk Point Light is TRUE（）.A
The light comes on at sunsetB
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from the still water plane to the crestB
from the still water plane to the troughC
from crest to troughD
between water levels at one-quarter of the wave's length
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单选题The waterplane area is described as the intersection of the surface of the water in which a vessel floats and the（）.A
baselineB
vertical reference planeC
hullD
horizontal reference plane
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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
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