单选题The speed _____ light travels is very high.A whichB at whichC in whichD with which

题目
单选题
The speed _____ light travels is very high.
A

which

B

at which

C

in which

D

with which

相似考题

1.A: It’s good of you to see me.B:_________. I have heard a lot about your company.A.Good things, I hope.B.News travels fast in the toy industry.C.Not at all.D.They are very impressive.

2.The African way of communication sent messages______.A. in a special wayB. over a very short distanceC. by a musical instrumentD. at a rather slow speed

3.Heavy objects and light objects () at the same speed.A、fallsB、fallC、fallenD、falling

4.The computer, working very fast, _________data at the speed of light.A． handlesB． handlingC． handledD． has handled

更多“The speed _____ light travels is very high.”相关问题

  • 第1题：

    Light travels at about ___.

    A.300,000 kilometres a second

    B.a second 300,000 kilometres

    C.every second 300,000 kilometres

    D.300,000 kilometre every second


    正确答案：A

  • 第2题：

    The computer works very fast, _________ data at the speed of light.

    A.having handled

    B.handling

    C.handled

    D.handles


    正确答案:B 

  • 第3题：

    A light siglinal consisting of three flashes means ______.

    A.I an in doubt as to your actions

    B.My engines are full speed astern

    C.I desire to overtake you

    D.I am operating astern propulsion


    正确答案：D
    由三闪组成的灯光信号，表示我船正在后退。

  • 第4题：

    共用题干
    Learn about Light
    1 .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 light
    B: the speed of light
    C: the path of light
    D: a straight line
    E: a beam of light
    F: a form of energy

    答案：A
    解析：
    该概括大意与完成句子所选的阅读材料为记述文，段落主题相对于论述文而言较松散，因此记述文中的段落大意往往需要考生根据自己的理解而归纳概括出来。解答概括大意题的技巧往往派不上用场。第二段主要讲述现代科学家认同了爱因斯坦的光电效应理论。因此可以判断A选项“当今人们如何解释光的性质”正确。
    第三段第一句“Things that give off light are known as sources of light.”就点明主旨，发光的物体是光源。所以B选项“什么是光源？”正确。
    第四段主要讲述光传播的问题，所以D选项“光是如何传播的”正确。
    第五段的关键字是speed of light，光速。所以C选项“物理学家如何测量光的速度”正确。
    题干意为“人们可以看见物体是因为光……。“从第二段最后一句可知，人们看见物体是因为光是一种能量。所以F项a form of energy正确的。
    题干意为“星星、火焰、手电筒都是……的例子。”第三段“Other sources of light include stars , flames , flashlights...”说明，这些都是光源的例子。所以A选项sourcesof light是正确的。
    题干意为“某些情况下，如反射和吸收可以改变……。”第四段中“there are some instances that can change the path and even the nature of light.They are reflection,ab-sorption , interference , etc.”这说明有一些情况可以改变光的路径。所以C选项the path of light是正确的。
    题干意为“Hippolyte Fizeau做了一个刚试……的实验。”文中最后一段 “Hippolyte Fizeau conducted an experiment by directing a beam of light to a mirror...he was able to calculate that the speed of light...”可知Hippolyte Fizeau通过实验计算出了光速。所以B选项是正确的。

  • 第5题：

    Some plants are very（）to light；they perfer the shade．
    A.sensible
    B.flexible
    C.objective
    D.sensitive


    答案：D
    解析：

  • 第6题：

    单选题
    （） thrust and resistance equal each other, the ship always travels at a constant speed.
    A

    As long as

    B

    As far as

    C

    As well as

    D

    Unless


    正确答案： C
    解析： 暂无解析

  • 第7题：

    单选题
    The type of fog that occurs on clear nights with very light breezes and forms when the earth cools rapidly by radiation is known as（）.
    A

    Radiation fog

    B

    Frontal fog

    C

    Convection fog

    D

    Advection fog


    正确答案： A
    解析： 暂无解析

  • 第8题：

    单选题
    When the normal compression ratio of a diesel engine is not very high, misfiring at light loads may be caused by （）
    A

    overloading the engine

    B

    low exhaust valve lift

    C

    excessive cylinder cooling

    D

    insufficient mechanical clearance


    正确答案： A
    解析： 暂无解析

  • 第9题：

    单选题
    A very light breeze that causes ripples on a small area of still water is a（）.
    A

    cat's paw

    B

    hog's breath

    C

    williwaw

    D

    chinook


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    The speed _____ light travels is very high.
    A

    which

    B

    at which

    C

    in which

    D

    with which


    正确答案： D
    解析：
    句意：光传播的速度非常快。which代替先行词在后面的定语从句中作at的宾语。“以什么样的速度传播”应该是travel at ... speed，介词不能省略，故选B。

  • 第11题：

    填空题
    Because light travels (fast) ____ than sound, lightning is seen before thunder(雷) is heard.

    正确答案： faster
    解析：
    本题考查副词的比较级。句意：由于光传播的速度比声音快，所以我们先看到闪电后听到雷声。than提示此处应为比较，因此要用fast的比较级faster。

  • 第12题：

    问答题
    John got married six months ago，and like many young people these days, they are struggling to make a home at a time when the cost of living is very high.

    正确答案：
    解析：

  • 第13题：

    The light from the sun moves away from its source in all directions, so its strength is very () .

    A.broken out

    B.spread out

    C.looked out

    D.figured out


    正确答案：B
    解析：broken out 爆发;spread out 分散;looked out 小心;figured out 搞清楚根据句子的意思，应该是光线的分散，所以选择B. 

  • 第14题：

    The speed of radio waves is equal to ________of light.

    A. those

    B. that

    C. the one

    D. the ones


    正确答案：B 

  • 第15题：

    共用题干
    Learn about Light
    1 .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 light
    B: the speed of light
    C: the path of light
    D: a straight line
    E: a beam of light
    F: a form of energy

    答案：F
    解析：
    该概括大意与完成句子所选的阅读材料为记述文，段落主题相对于论述文而言较松散，因此记述文中的段落大意往往需要考生根据自己的理解而归纳概括出来。解答概括大意题的技巧往往派不上用场。第二段主要讲述现代科学家认同了爱因斯坦的光电效应理论。因此可以判断A选项“当今人们如何解释光的性质”正确。
    第三段第一句“Things that give off light are known as sources of light.”就点明主旨，发光的物体是光源。所以B选项“什么是光源？”正确。
    第四段主要讲述光传播的问题，所以D选项“光是如何传播的”正确。
    第五段的关键字是speed of light，光速。所以C选项“物理学家如何测量光的速度”正确。
    题干意为“人们可以看见物体是因为光……。“从第二段最后一句可知，人们看见物体是因为光是一种能量。所以F项a form of energy正确的。
    题干意为“星星、火焰、手电筒都是……的例子。”第三段“Other sources of light include stars , flames , flashlights...”说明，这些都是光源的例子。所以A选项sourcesof light是正确的。
    题干意为“某些情况下，如反射和吸收可以改变……。”第四段中“there are some instances that can change the path and even the nature of light.They are reflection,ab-sorption , interference , etc.”这说明有一些情况可以改变光的路径。所以C选项the path of light是正确的。
    题干意为“Hippolyte Fizeau做了一个刚试……的实验。”文中最后一段 “Hippolyte Fizeau conducted an experiment by directing a beam of light to a mirror...he was able to calculate that the speed of light...”可知Hippolyte Fizeau通过实验计算出了光速。所以B选项是正确的。

  • 第16题：

    共用题干
    Learn about Light
    1 .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?

    答案：C
    解析：
    该概括大意与完成句子所选的阅读材料为记述文，段落主题相对于论述文而言较松散，因此记述文中的段落大意往往需要考生根据自己的理解而归纳概括出来。解答概括大意题的技巧往往派不上用场。第二段主要讲述现代科学家认同了爱因斯坦的光电效应理论。因此可以判断A选项“当今人们如何解释光的性质”正确。
    第三段第一句“Things that give off light are known as sources of light.”就点明主旨，发光的物体是光源。所以B选项“什么是光源？”正确。
    第四段主要讲述光传播的问题，所以D选项“光是如何传播的”正确。
    第五段的关键字是speed of light，光速。所以C选项“物理学家如何测量光的速度”正确。
    题干意为“人们可以看见物体是因为光……。“从第二段最后一句可知，人们看见物体是因为光是一种能量。所以F项a form of energy正确的。
    题干意为“星星、火焰、手电筒都是……的例子。”第三段“Other sources of light include stars , flames , flashlights...”说明，这些都是光源的例子。所以A选项sourcesof light是正确的。
    题干意为“某些情况下，如反射和吸收可以改变……。”第四段中“there are some instances that can change the path and even the nature of light.They are reflection,ab-sorption , interference , etc.”这说明有一些情况可以改变光的路径。所以C选项the path of light是正确的。
    题干意为“Hippolyte Fizeau做了一个刚试……的实验。”文中最后一段 “Hippolyte Fizeau conducted an experiment by directing a beam of light to a mirror...he was able to calculate that the speed of light...”可知Hippolyte Fizeau通过实验计算出了光速。所以B选项是正确的。

  • 第17题：

    共用题干
    Learn About Light

    1 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 accepted
    during 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 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,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 light
    B:the speed of light
    C:the path of light
    D:a straight line
    E:a beam of light
    F:a form of energy

    答案：F
    解析：
    第二段前半部分介绍了爱因斯坦的光电效应理论，后半部分则介绍了现代科学家对于 光的看法：他们认为光具有二重性。
    第三段主要讲述了光源的定义和常见的光源，故选B。
    第四段主要讲述了光的传播方式以及影响光的传播方式和性质的因素，故选D。
    第五段以Flippolvte Fizeau为例，介绍了物理学家是如何测定光速的，故选C。
    文章第一段中只提到光像一条直线一样传播，而并非说光是一条直线。另外，由第二段 最后一句话“it is a form of energy that allows us to see things around us.”可知，光是一种能让我 们看到周围事物的能量，故选F。
    山第三段的最后一句话“Other sources of light include stars, flames, flashlights, street lamps and glowing gases in glass tube.”可知，应选A。
    由第四段最后两句话可知，一些因素会影响光的传播路径，这些因素包括光的反射、光 的吸收和光的干扰，故选C。
    由第五段的实例可知,Hippolyte Fizcau是用一束光测出了光的速度，故选B。第4部分；阅读理解第一篇 本篇文章主要讲述了石墨烯对于将未电子学发展的重要性以及人们可用一种简单的方式发 现石、墨烯。

  • 第18题：

    单选题
    We see lightning before we hear the thunder because sound travels more slowly than light is.
    A

    before we

    B

    because

    C

    more slowly

    D

    light is


    正确答案： D
    解析：

  • 第19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 port

    B

    maintain course and speed

    C

    alter course to starboard

    D

    maintain course and reduce speed


    正确答案： B
    解析： 暂无解析

  • 第20题：

    单选题
    What color exhaust will be exhibited when a slow speed two-stroke/cycle main propulsion diesel engine, designed to operate on light and heavy fuel oil, is operated on insufficiently preheated heavy fuel oil?（）
    A

    White

    B

    Black

    C

    Blue

    D

    Clear


    正确答案： B
    解析： 暂无解析

  • 第21题：

    单选题
    According to the information given in the passage, if two20-year-old twins lived on earth, and one of them left on a journey for Alpha Centauri at very close to the speed of light, then managed to survive the journey and return to earth having aged 40 years during the journey, what could she expect to find upon her return to earth?
    A

    Her great-grandmother

    B

    Her twin at the age of 20

    C

    Her twin at the age of 40

    D

    Her twin at the age of 60

    E

    Her twin’s great-grandchildren


    正确答案： C
    解析：
    推断题。根据文章第二段“If Mr. Einstein was right about relativity. . . then time slows down when you approach the speed of light. A person traveling at any velocity near the speed of light will age only days for every week, month, or even year that passes on earth.”一句可知，E项是正确的。

  • 第22题：

    单选题
    In determining a safe speed（）shall not be among those taken into account.
    A

    the presence of the background light at night

    B

    the state of wind，sea and current

    C

    the number of crew on board

    D

    the draught in relation to the available depth of water


    正确答案： B
    解析： 暂无解析

  • 第23题：

    单选题
    A light signal consisting of three flashes means （）.
    A

    I am in doubt as to your actions

    B

    My engines are full speed astern

    C

    I desire to overtake you

    D

    I am operating astern propulsion


    正确答案： D
    解析： 暂无解析

  • 第24题：

    单选题
    As you approach Old River Control Structure Light you see a flashing amber light. You should（）.
    A

    navigate as close to the left descending bank as safety permits

    B

    navigate as close to the right descending bank as safety permits

    C

    turn into the inflow channel as the bypass is now open

    D

    slow your engine speed to not more than 5 mph


    正确答案： C
    解析： 暂无解析

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