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

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

相似考题

4.CIn most situations, light helps us see. But nowadays humans are using too much of it so that it is in fact a kind of pollution.When it comes to looking at the night sky, too much light makes it difficult for us to watch some of life’s most wonderful sights: stars, planets and even galaxies(星系).According to scientific research, about 2, 500 stars can be seen by the human eye without using any special equipment(设备). But because of light pollution, you can only see 200 to 300 stars from today’s countryside, and no more than ten stars from a city. In most big cities, people cannot see the sky filled with stars like they did in their childhood.Light pollution affects more than just our view of sky. Research shows that lots of nighttime light can harm wildlife, too.When birds fly to another place over cities, they sometimes get lost by the brightness and fly in circles(圈) until they drop from tiredness. Sea turtles(海龟) need dark beaches for laying eggs, but they can’t find their ideal places because of those bright lights.Too much light at night may even affect human health, but scientists are not sure of that. They are still learning more.In order to prevent things from going worse, governments and some organizations are working to reduce light pollution. Many cities and towns have taken action to reduce the use of lights at night. Lights are used only when and where they are truly needed. They also shine lights down at the ground instead of up into the sky and use lower brightness levels.Hopefully, in the near future, humans can enjoy the clear and beautiful sky again and all the wildlife will live a peaceful and undisturbed life, too.27. Why does the writer think that too much light is a kind of pollution?A. Because there are fewer and fewer stars.B. Because human health has been affected.C. Because too much light is a waste of energy.D. Because some of the wildlife can be harmed.

更多“填空题Because light travels (fast) ____ than sound, lightning is seen before thunder(雷) is heard.”相关问题
  • 第1题:

    29. When it thunders, we always see the light before we hear the sound.______ It’s because

    A. our eyes are in front of our ears

    B. our eyes are cleverer than our ears

    C. our eyes can see but our ears can-t

    D.light goes faster than sound


    正确答案:D
    29.D【解析】这是一个科普常识,因为光速比声速快。

  • 第2题:

    A technician installs a new sound card but no sound can be heard. Which of the following utilities can be used to see an error?()

    A. MSCONFIG

    B. Device Manager

    C. DXDIAG

    D. REGEDIT


    参考答案:B

  • 第3题:

    根据以下材料,回答 40~43 问题。

    During a television play the sound man must be ready to make every sound as it is needed.Sound effects are of three kinds:real,imitated and recorded.

    Real sounds are those of doorbells,telephone bells,and other small objects easy to keep in a studio. But the sound man must imitate many sounds. For bacon fryin9,he crumples cellophane paper.A long sheet of metal hanging in a doorway makes thunder·He taps one rubber sink plunger and then another on a table to imitate a horse walking on pavement. For a horse galloping along a gravel road,the sound man can use the two halves of a coconut,pounding each in turn very fast on the table.

    Recorded sound effects are used for noises he cannot himself produce offstage.He pays records for such sounds as a rooster crowing, a train leaving a station, and a baby crying.

    The sound man is an important part of any television production.

    第 40 题 The sound man is important because he________

    A.is kept busy

    B.makes fl TV play more lifelike

    C.1ets an actor know when to life a telephone receiver

    D.is always learning new methods


    正确答案:B
    从文章中很容易就能判断出答案。

  • 第4题:

    A head on situation shall be deemed to exist at night when a power-driven vessel sees another power-driven vessel ahead and ______.

    A.one sidelight and the masthead light are visible

    B.the vessels will pass closer than half a mile

    C.both vessels sound one prolonged blast

    D.both sidelights and masthead light(s) are visible


    正确答案:D

  • 第5题:

    Brief, violent showers frequently accompanied by thunder and lightning are usually associated with ______.

    A.passage of a warm front

    B.winds shifting counterclockwise in the Northern Hemisphere

    C.stationary high pressure systems

    D.passage of a cold front


    正确答案:D
    经常带有雷声和闪电的短暂而猛烈的阵雨通常伴随在冷锋的路线上。

  • 第6题:

    A technician installs a new sound card but no sound can be heard. Which of the following utilities can be used to see an error?()

    • A、MSCONFIG
    • B、Device Manager
    • C、DXDIAG
    • D、REGEDIT

    正确答案:B

  • 第7题:

    填空题
    We eat at the fast food restaurants more because it is quick than because we really need the food.____

    正确答案: H
    解析:
    由题目中的“fast food restaurants”可以定位到H段。题目中“more because ... than because”结构与文中“you perhaps ... but buy just because ...”表达的意思一样,即人们购买快餐并不是因为人们想吃快餐而是因为它节约时间,故匹配段落为H段。

  • 第8题:

    单选题
    Police and villagers unanimously _____ the forest fire to thunder and lightning.
    A

    ascribed

    B

    approached

    C

    confirmed

    D

    confined


    正确答案: B
    解析:
    本句的意思是“警察和村民一致认为森林火灾是由雷电引起的”。ascribe to意为“把…归因于”;approach意为“接近”;confirm意为“确认,证实”;confine意为“限制”。

  • 第9题:

    单选题
    Mary is as fast as, if not faster than, anyone in her class and should be on the team.
    A

    as fast, if not faster than, anyone else

    B

    as fast as, if not more fast than, anyone

    C

    as fast as, if not faster than, anyone else

    D

    as fast, if not faster than, anyone


    正确答案: A
    解析:
    比较级和同等比较的应用。同等比较的结构为:as+形容词/副词的原级+as+比较对象。可排除选项A和D。少于两个音节的形容词/副词的比较级是在后面后加-er,或用more+形容词/副词的原级,fast的比较级为faster,故排除选项B。因此选C。

  • 第10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11题:

    单选题
    Brief,violent showers frequently accompanied by thunder and lightning are usually associated with().
    A

    passage of a warm front

    B

    passage of a cold front

    C

    winds shifting counterclockwise in the Northern Hemisphere

    D

    stationary high pressure systems


    正确答案: D
    解析: 暂无解析

  • 第12题:

    填空题
    Before the flight takes off, all passengers are asked to (fast) ____ their seat belts.

    正确答案: fasten
    解析:
    本题考查词性转换。句意:在飞机没起飞前,所以的乘客都被要求系好安全带。由ask sb. to do sth.可知,to后接不定式动词原形,即需要把形容词fast转换为动词fasten,意为“把……拴紧”。

  • 第13题:

    You see the lightning _____ it happens, but you hear the thunder later.

    A.in an instant

    B.on the instant

    C.for an instant

    D.the instant


    正确答案: D

  • 第14题:

    Why do the American doctors think of using laser light to treat heart disease?

    A.Beeause laser light is quite powerful.

    B.Because laser light is penetrating.

    C.Because laser light can destroy the blocking materials in human’s artery.

    D.Because laser light can travel through the human body.


    正确答案:C
    根据文章第二段开头一句,可知激光能够清除动脉里的脂肪物质,因此答案应是C项。

  • 第15题:

    .Why do Americans like to go to fast food restaurants?

    A.It is because fast food restaurants are fast,informal,and inexpensive.

    B.It is because people can easily find fast food restaurants.

    C.It is because people like to eat hamburgers.

    D.It is because fast food restaurants sell nearly every kind of food.


    正确答案:A
    根据文章第三自然段中的内容“customers can wear any type of dress whenthey go to a fast food place”可以推断到快餐店就餐可不拘礼节;“Second,they are fast”表示(第二点)快餐店食品供应速度快;“Finally most food in a fast food restaurant is not expensive”说明快餐店的又一特点是大多数食物都不贵。由此可选择出正确答案。

  • 第16题:

    When making landfall at night,the light from a powerful lighthouse may sometimes be seen before the lantern breaks the horizon.This light is called the ______.

    A.diffusion

    B.backscatter

    C.loom

    D.elevation


    正确答案:C

  • 第17题:

    Some Southern learners of English in China tend to say“night”as“light”.This shows:().

    AThey cannot pronounce/n/

    BInterlangue interference because there is notthe sound /n/in their mother tongue

    CThe teachers do not have a good teaching method

    DThey do not like to pronounce nasal sounds


    B

  • 第18题:

    填空题
    It is a fact that traditional meals are (healthy) ____ than fast foods.

    正确答案: healthier
    解析:
    本题考查形容词的比较级。句意:事实上,传统食物比快餐更有营养。当两者进行比较时,应使用比较级,此处用healthy的比较级形式healthier。

  • 第19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: B
    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20题:

    单选题
    The pilot of the plane which flies faster than sound travels does not hear the thunderclaps because______.
    A

    the sound of plane engine travels slower than the plane

    B

    the frequency of the sound alters

    C

    the passage does not mention it

    D

    the pressure decreased when the plane flies in the air


    正确答案: C
    解析:
    推断题。文章第二段首句提到了题干中的话,但该段随后讲述的就是声音的产生和频率等,并没有对该问题展开论述,因此C项正确。

  • 第21题:

    单选题
    Some Southern learners of English in China tend to say“night”as“light”.This shows:().
    A

    They cannot pronounce/n/

    B

    Interlangue interference because there is notthe sound /n/in their mother tongue

    C

    The teachers do not have a good teaching method

    D

    They do not like to pronounce nasal sounds


    正确答案: B
    解析: 暂无解析

  • 第22题:

    单选题
    A head on situation shall be deemed to exist at night when a power-driven vessel sees another power-driven vessel ahead and ().
    A

    one sidelight and the masthead light are visible

    B

    the vessels will pass closer than half a mile

    C

    both vessels sound one prolonged blast

    D

    both sidelights and masthead light(s) are visible


    正确答案: D
    解析: 暂无解析

  • 第23题:

    单选题
    In the eighteenth century, politics was thought be an improper sphere for women, whose boycott of English goods was different than any protest the English had seen before
    A

    whose boycott of English goods was different than any protest the English had seen before

    B

    whose boycotting English goods was different than any protest the English had seen before

    C

    whose boycott of English goods was different from any protest the English had seen before

    D

    whose boycott of English goods was different from any protest the English saw before

    E

    whose boycotting of English goods was different from any protest the English have seen before


    正确答案: D
    解析:
    A和B项没有使用固定搭配“different from”。D和E项动词的时态不正确。