There's much to see under the sea，but you need to remember that light behaves differently in water than in air.The objects appear closer to you than they exactly are.You might find yourself reaching out to touch something and completely missing it.
Objects under water will appear larger than they would on the surface，too.Be careful not to tell any stories about the big fish that got away.That fish might not be so big after all!It's just because sometimes things can seem to be as much as about 33 percent bigger in water!
What's more，in deeper water，colors just seem as bright.In fact，it looks as if some colors are missing.Remember the color of an object results from the wavelengths（波長(zhǎng)）of light that are reflected（反射）from its surface.And light is taken in as it moves down through the water.
Swimmers wear wet suits to keep warm underwater.Let's take a bright red，yellow and blue wet suit as an example.These colors are hard to miss on the surface of water.Watch carefully the changes in colors as you descend in the water.The red part now looks almost black because the red light wavelengths，the longest among these three colors，are missing.As you go down deeper，the same thing will happen to the yellow part and in the end to the blue part.Even at a place of about 6 to 9 meters underwater，you will look terrible，like a ghost!And you have to wait for your return to the surface to enjoy the bright colors again!
（1）You miss the object underwater when you want to touch it because CC.
A．Your eyesight is quite poor
B．you are not quick enough
C．it is not as close as it seems
D．it disappears very quickly
（2）The example of the wet suit is used to explain the change of BB of and object underwater.
A．the size
B．the color
C．the position
D．the weight
（3）The underlined word "descend" probably means DD in Chinese in this passage.
A．上升
B．漂浮
C．屏息
D．下潛
（4）Which of the following is true？ BB
A．A four-meter-long of red light is longer than those of blue light.
B．The wavelengths of red light are longer than those of blue light.
C．Much water will be taken in by the swimmer deep in the water.
D．You will see a ghost if you go as deep as 6 to 9 meters into the sea.
（5）The best title of this passage is DD.
A．The Standard of Color Underwater
B．The Direction of Light Underwater
C．The Brightness of Color Underwater
D．The Behavior of Light Underwater
【答案】C；B；D；B；D
【解答】
【點(diǎn)評(píng)】
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發(fā)布：2024/4/20 14:35:0組卷：4引用：1難度：0.8
相似題
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1．Whales are the largest living organisms （生物）living on the surface of the earth.An adult blue whale weighs up to 173 tonnes with 30 meters in length.When a whale dies in the ocean，its body usually falls to the sea floor and a special deep-sea ecosystem will be formed in a long time.Scientists give a name to this：the whale fall.
Recently，some scientists on a Chinese research ship called Tansuo-1 found a whale fall at the depth of 1，600 meters in the South China Sea.Whale falls are seldom found by humans.This is the first time China has found this type of ecosystem.So far，less than 50 modern natural whale falls have been found by humans around the world.
The whale fall is really important to deep-sea animals，as it provides food for them.Usually，the whale fall goes through three stages.The first stage comes just after the whale dies.The body attracts lots of big sea animals such as shark and they come to eat the body.This stage lasts from months to years.At the second stage，smaller animals come for the whale's bones and leftovers.This stage can last one or two years.Bacteria （細(xì)菌）play a role at the third stage.They break down what has been left.This stage can last as long as 100 years.
The whale fall found in the South China Sea is 3 meters long.It is still at the first stage.The scientists said it would take them a long time to study the whale fall because they knew it would help them understand the deep-sea ecosystem better.
（1）When whales die in the ocean，most of their bodies usually.
A．a(chǎn)re saved by scientists
B．a(chǎn)re found on the beach
C．float on the ocean surface
D．sink to the bottom of the ocean
（2）The Chinese meaning of the underlined word "ecosystem" is.
A．經(jīng)濟(jì)學(xué)
B．生態(tài)系統(tǒng)
C．電子信息
D．環(huán)保體系
（3）The whale fall goes through the following stages，and the correct order is.
①Bacteria break down the rest of the whale.②Smaller animals eat the whale's bones.
③The whale dies in the ocean.④Big sea animals eat the whale's body.
A． ③④①②
B． ④③①②
C． ③④②①
D． ④③②①
（4）According to the passage，we know that.
A．a(chǎn)n adult blue whale weighs up to 173 tons
B．some scientists found a whale fall in the South China Sea
C．a(chǎn)t the first stage，smaller animals come for the whale's bones
D．the whale fall found in the South China Sea is in the third stage
（5）The best title for this passage maybe "".
A．The Whale Fall
B．A Chinese Research
C．Whales in the Ocean
D．The Deep-sea Ecosystem發(fā)布：2024/12/27 17:30:2組卷：13引用：3難度：0.5 -
2．When John was growing up，other kids felt sorry for him．His parents always had him working in the garden，carrying out the garbage and delivering newspapers．But when John reached adulthood，he was better off than his childhood playmates．He had more job satisfaction，a better marriage and was healthier．Most of all，he was happier．Far happier．
These are the findings of a 40-year study that followed the lives of 456 teenage boys from Boston．The study showed that those who had worked as boys enjoyed happier and more productive lives than those who had not．"Boys who worked in the home or community were better at dealing with problems and felt more confident．They believed they could achieve very much．" said George Vaillant ，the psychologist（心理學(xué)家）who made the discovery．"And because they felt good about themselves，others felt good about them．"
In the study，Vaillant's team compared these men's achievements with their boyhood working experiences．They paid attention to lots of details．They found out the success as adults had a lot to do with the boyhood activities．Those who did the most boyhood activities were twice as likely （可能的）to have warm relations with a wide variety of people，five times as likely to be well paid and 16 times less likely to lose their jobs．The study also suggested that IQ and family background made no real difference in how the boys turned out．Working-at any age-is important．Childhood activities ，such as part-time jobs，housework，effort in school and the ability to solve the problems help a child develop his abilities，which are keys to a happy world．They also help him understand that people must cooperate and work toward common goals．The most competent adults are those who know how to do this．Yet work isn't everything．As Tolstoy once said，"One can live magnificently in this world if one knows how to work and how to love，to work for the person one loves and to love one's work．"
（1）The passage mainly tells us．
A．John did a lot of housework when he was young
B．George Vaillant studied 456 teenage boys from Boston for 40 years．
C．housework helps a teenager become happy．
D．boyhood working experiences are very important for a man to enjoy a better life
（2）We can learn that John．
A．enjoyed his job and marriage
B．had few childhood playmates
C．received little love from his family
D．was lazy in his childhood
（3）It's clear that the following finding are from Vaillant's study Except （除了）．
A．childhood activities help people get on well with others
B．those who had worked as boys could find a job easily
C．hard-working boys got paid more when they grew up
D．those who had kinds of childhood activities are less likely to lose jobs．
（4）The underlined word cooperate may meanin the passage．
A．compete
B．compare
C．work together
D．care for
（5）The best title for passage is ""．
A．Learn to work from a young age
B．Work is everything
C．A child's behavior is like a mirror
D．Practice makes perfect發(fā)布：2024/12/27 17:30:2組卷：35引用：3難度：0.5 -
3．①Recently，I have finished four space tasks.I stayed in space for more than 43 days，and complete six spacewalks for 43 hours and 13 minutes，so I have a lot of experience there.Today，I want to share some information unusual：what it's like to eat in space.
②People often ask me if Tang- -a kind of orange drink mix--is still taken in space.Don't laugh，but we still drink it.Today's space foods look like foods we're used to eating every day.Foods，like nuts （堅(jiān)果） or brownies （布朗尼蛋糕），can be taken on board as much as possible.But things like macaroni （通心面） or noodles would be specially prepared，then kept and packaged （打包） to stop them going everywhere .It's a difficult but necessary process.However，food on a space task can be quite rich and various，can't it？
③The microgravity （微重力） on the space station changes things in some ways.For one thing，there is no"up" or "down" in space.It also changes how things taste.On Earth，most of your blood is usually below your heart.In space，you're weightless，so the sharing of blood in your body changes.One result is lowering your sense of taste，at least at first.This happened to me on one task.When I took sugar candy，I wasn't able to taste it until the ninth day.
④Food can be a real happiness in space.For us，eating is more than just getting power and energy.Familiar foods and tastes can remind us of home and keep us feeling that we still keep in touch with Earth.
（1）What is the passage about？
A．Life in space.
B．Eating in space.
C．Exercise in space.
D．Sleeping in space.
（2）Who might the writer be？
A．A teacher.
B．A scientist.
C．An astronaut.
D．A police artist.
（3）What does the underlined word "various" mean in the second paragraph？
A．Be of much money.
B．Be of similar taste.
C．Be of the same color.
D．Be of different kinds.
（4）How is the passage organized？
A．
B．
C．
D．
發(fā)布：2024/12/27 18:30:2組卷：14引用：5難度：0.6
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