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The irregular black line around a charted light such as Race Rock Light indicates that it is ______.
A.unwatched
B.surrounded by riprap
C.a minor light
D.constructed on an artificial island
参考答案
更多 “ The irregular black line around a charted light such as Race Rock Light indicates that it is ______.A.unwatchedB.surrounded by riprapC.a minor lightD.constructed on an artificial island ” 相关考题
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A list signal of one white light indicates that the vessel is ______.A.on an even keelB.listing about 1° to the side the light is displayed onC.listing over 5°With the light displayed on the high sideD.listing，and the chutes should be directed to the side where the light is displayed
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A radar range to a small，charted object such as a light will provide a line of position in which form?A.Straight lineB.ArcC.ParabolaD.Hyperbola
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A steep barometric gradient indicates ______.A.calmsB.light windsC.strong windsD.precipitation
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Which word indicates color variation in the characteristics of a light?A.OpposingB.ChangingC.ReversingD.Alternating
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A vessel showing a green light over a white light in a vertical line above the level of the sidelights is ______.A.engaged in underwater constructionB.under sail and powerC.a pilot vesselD.trawling
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A buoy marking a wreck will show a(an) ______.A.white light FL (2) and a topmark of 2 black spheresB.occulting green light and may be letteredC.yellow light and will be numberedD.continuous quick white light and may be numbered
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共用题干
Learn about Light1 .Ancient civilizations were amazed by the existence of light for thousands of years. The Greek philosophers believed that light was made up of countless,tiny particles that enter the human eye and create what we call vision. However,Empedocles and a Dutch scientist named Christian Huygens believed that light was like a wave. According to them,light spread out and travelled like a straight line. This theory was accepted during the 19th century.2 .In 1905,Albert Einstein published a research paper in which he explained what is re-ferred to as the photoelectric effect. This theory explains that particles make up light.The particles Einstein was referring to are weightless bundles（束）of electromagnetic（电磁）energy called photons（光子）.Today,scientists agree that light has a dual（二重）nature一it is part particle and part wave. It is a form of energy that allows us to see things around us.3 .Things that give off light are known as sources of light. During the day,the primary source of light is the sun. Other sources of light include stars,flames,flashlights,street lamps and glowing gases in glass tube.4 .When we draw the way light travels we always use straight lines. This is because nor-mally light rays travel in a straight line. However,there are some instances that can change the path and even the nature of light. They are reflection,absorption,interference（干扰）, etc.5 .Physicists have attempted to measure the speed of light since the early times. In 1849, Hippolyte Fizeau conducted an experiment by directing a beam of light to a mirror located kilometers away and placed a rotating cogwheel（旋转齿轮）between the beam and the mirror. From the rate of rotation of the wheel,number of wheel's teeth and distance of the mirror,he was able to calculate that the speed of light is 313 million meters per second. In a vacuum（真空）,however,the speed of light is 299,792,458 meters per second. This is about a million times faster than the speed of an airplane.Objects are visible to the human eye as light is______.A: sources of lightB: the speed of lightC: the path of lightD: a straight lineE: a beam of lightF: a form of energy
考题
共用题干
Learn about Light1 .Ancient civilizations were amazed by the existence of light for thousands of years. The Greek philosophers believed that light was made up of countless,tiny particles that enter the human eye and create what we call vision. However,Empedocles and a Dutch scientist named Christian Huygens believed that light was like a wave. According to them,light spread out and travelled like a straight line. This theory was accepted during the 19th century.2 .In 1905,Albert Einstein published a research paper in which he explained what is re-ferred to as the photoelectric effect. This theory explains that particles make up light.The particles Einstein was referring to are weightless bundles（束）of electromagnetic（电磁）energy called photons（光子）.Today,scientists agree that light has a dual（二重）nature一it is part particle and part wave. It is a form of energy that allows us to see things around us.3 .Things that give off light are known as sources of light. During the day,the primary source of light is the sun. Other sources of light include stars,flames,flashlights,street lamps and glowing gases in glass tube.4 .When we draw the way light travels we always use straight lines. This is because nor-mally light rays travel in a straight line. However,there are some instances that can change the path and even the nature of light. They are reflection,absorption,interference（干扰）, etc.5 .Physicists have attempted to measure the speed of light since the early times. In 1849, Hippolyte Fizeau conducted an experiment by directing a beam of light to a mirror located kilometers away and placed a rotating cogwheel（旋转齿轮）between the beam and the mirror. From the rate of rotation of the wheel,number of wheel's teeth and distance of the mirror,he was able to calculate that the speed of light is 313 million meters per second. In a vacuum（真空）,however,the speed of light is 299,792,458 meters per second. This is about a million times faster than the speed of an airplane.Stars,flames,flashlights are some examples of______.A: sources of lightB: the speed of lightC: the path of lightD: a straight lineE: a beam of lightF: a form of energy
考题
共用题干
Learn about Light1 .Ancient civilizations were amazed by the existence of light for thousands of years. The Greek philosophers believed that light was made up of countless,tiny particles that enter the human eye and create what we call vision. However,Empedocles and a Dutch scientist named Christian Huygens believed that light was like a wave. According to them,light spread out and travelled like a straight line. This theory was accepted during the 19th century.2 .In 1905,Albert Einstein published a research paper in which he explained what is re-ferred to as the photoelectric effect. This theory explains that particles make up light.The particles Einstein was referring to are weightless bundles（束）of electromagnetic（电磁）energy called photons（光子）.Today,scientists agree that light has a dual（二重）nature一it is part particle and part wave. It is a form of energy that allows us to see things around us.3 .Things that give off light are known as sources of light. During the day,the primary source of light is the sun. Other sources of light include stars,flames,flashlights,street lamps and glowing gases in glass tube.4 .When we draw the way light travels we always use straight lines. This is because nor-mally light rays travel in a straight line. However,there are some instances that can change the path and even the nature of light. They are reflection,absorption,interference（干扰）, etc.5 .Physicists have attempted to measure the speed of light since the early times. In 1849, Hippolyte Fizeau conducted an experiment by directing a beam of light to a mirror located kilometers away and placed a rotating cogwheel（旋转齿轮）between the beam and the mirror. From the rate of rotation of the wheel,number of wheel's teeth and distance of the mirror,he was able to calculate that the speed of light is 313 million meters per second. In a vacuum（真空）,however,the speed of light is 299,792,458 meters per second. This is about a million times faster than the speed of an airplane.Paragraph 5______A: How Is the Nature of Light Explained Today?B: What Are Sources of Light?C: How Did Physicists Measure the Speed of Light?D: How Does Light Travel?E: How Did People Think of Light Years Ago?F: What Causes a Shadow?
考题
Light rays are turned aside by the intense gravitational field surrounding a black hole.A:heightened
B:deflected
C:rotated
D:created
考题
共用题干
Learn About Light1 Ancient civilizations were amazed by the existence of light for thousands of years?The Greek philoso- phrrs believed that light was made up of countless,tiny particles that enter the human eye and create what we call vision.However,Empedocles and a Dutch scientist named Christian Huygens believed that light wag like a wave.According to them,light spread out and travelled like a straight line.This theory was acceptedduring the 19th century.2 In 1905,Albert Einstein published a research paper in which he explained what is referred to as the photoelectric effect.This theory explains that particles make up light.The particles Einstein was referring to are weightless bundles（束）of electromagnetic（电磁）energy called photons（光子）.Today,scientists agree that light has a dual（二重）nature一it is part particle and part wave. It is a form of energy that allows us tosee things around us.3 Things that give off light are known as sources of light.During the day,the primary source of light is the sun.Other sources of light include stars,flames,flashllights,street lamps and glowing gases in glass tube.4 When we draw the way light travels we always use straight lines.This is because normally light rays travel in a straight line.However,there are some instances that can change the path and even the nature of light. They are reflection,absorption,interference（干扰）,etc.5 Physicists have attempted to measure the speed of light since the early times.In 1849,Hippolyte Fizeau conducted an experiment by directing a beam of light to a mirror located kilometers away and placed a rotating cogwheel（旋转齿轮）between the beam and the mirror. From the rate of rotation of the wheel, number of wheel'S teeth and distance of the mirror,he was able to calculate that the speed of light is 313 million meters per second.In a vacuum（真空）,however,the speed of light is 299,792,458 meters per second.This is about a million times faster than the speed of an airplane.Objects are visible to the human eye as light is_______. A:sources of lightB:the speed of light C:the path of lightD:a straight lineE:a beam of lightF:a form of energy
考题
送撇缆上岸。（）A、Send rope to shore .B、Send heavy line to shore .C、Send heaving line ashore .D、Send light line ashore .
考题
单选题A vessel engaged in trawling will show identification lights of（）.A
a red light over a white lightB
a white light over a red lightC
a green light over a white lightD
two red lights in a vertical line
考题
单选题You see a vessel displaying three lights in a vertical line.The highest and lowest lights are red and the middle light is white.She is also showing a white light at the stern，which is lower than the forward light.It could be a（）.A
Survey vesselB
Vessel not under commandC
Vessel agroundD
Pilot vessel with port side to you
考题
单选题A buoy with a composite group-flashing light indicates a(n)（）.A
bifurcationB
fish net areaC
anchorage areaD
dredging area
考题
单选题A vessel showing a green light over a white light in a vertical line above the level of the sidelights is（）.A
engaged in underwater constructionB
under sail and powerC
a pilot vesselD
trawling
考题
单选题When using a buoy as an aid to navigation which of the following should be considered?（）A
The buoy should be considered to always be in the charted locationB
If the light is flashing，the buoy should be considered to be in the charted locationC
The buoy may not be in the charted positionD
The buoy should be considered to be in the charted position if it has been freshly painted
考题
单选题At 0630 you increase speed to 12.0 knots. At 0645 Race Rock Light bears 294°pgc. At 0700 Race Rock Light bears 293°pgc. Based on this，you should（）.A
alter course to portB
maintain course and speedC
alter course to starboardD
maintain course and reduce speed
考题
单选题A buoy marking a wreck will show a(n)（）.A
white light FL (2) and a topmark of 2 black spheresB
occulting green light and may be letteredC
yellow light and will be numberedD
continuous quick white light and may be numbered
考题
单选题Which word indicates color variation in the characteristics of a light?（）A
OpposingB
ChangingC
ReversingD
Alternating
考题
单选题The irregular black line around a charted light such as Race Rock Light indicates that it is （）.A
unwatchedB
surrounded by riprapC
a minor lightD
constructed on an artificial island
考题
单选题A list signal of one white light indicates that the vessel is （）.A
on an even keelB
listing about 1° to the side the light is displayed onC
listing over 5° With the light displayed on the high sideD
listing，and the chutes should be directed to the side where the light is displayed
考题
单选题You have berthed in a area with other tank vessels. What signal is displayed by a vessel to indicate it is transferring flammable or combustible liquid cargo?（）.A
A flashing yellow lightB
A red light visible all around the horizonC
A green light visible all around the horizonD
An illuminated red and yellow caution flag
考题
单选题Which statement concerning Montauk Point Light is TRUE（）.A
The light comes on at sunsetB
There is an emergency light if the main light is extinguishedC
The height of the light is 24 feetD
The tower is painted with black and white stripes
考题
单选题At 0715 you take the following bearings: Race Rock Light 328°pgc; Little Gull Island Light 249°pgc; Mt. Prospect Antenna 036°pgc. Based on your 0715 fix，which statement is TRUE?（）A
You are to the left of your track lineB
Your fathometer reads about 265 fathomsC
You are in a cable areaD
You are governed by the Inland Rules
考题
单选题A radar range to a small，charted object such as a light will provide a line of position in which form? （）A
Straight lineB
ArcC
ParabolaD
Hyperbola
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