精英家教網 > 初中英語 > 題目詳情
閱讀理解。
 Light reflecting
    You cannot see any object unless light from that object gets into your eyes. Some of the things you see
 give off light of their own. The sun, the stars, a lighted lamp are the examples that can be seen by their own
  light. Such things are luminous, most of the things you see are not giving off light of their own. They are
 simply reflecting light that falls on them from the sun or some other luminous body. The moon, for
 example, doesn't give off any light of its own. It is nonluminous. You see it because sunlight falls on it and
 some of it reflects in our direction. So moonlight is only second-hand sunlight.
     When you look at a book, it sends some of the light which falls on it to your eyes, and you see the
 book. If light could be kept out from where you are so that there would be no light from the book to
 reflect, then you could not see the book even with your eyes wide open. Light travels so fast that the time
 in which it travels from the book you are reading to your eyes is as short as if there were no time at all.
 Light reaches us from the moon, which is about 380, 000 kilometers away, in only a little more than a
 second.
1. You can see the book because _____. 
    A. your eyes are close to it        
    B. it reflects some of the light
    C. it has light of its own          
    D. your eyesight can get to it
2. The underlined word "luminous" means "_____".
    A. can't be seen    
    B. can be seen    
    C. giving off light    
    D. not like sunlight
3. _____ have light of their own.
    A. The sun and the moon            
    B. The stars and the earth 
    C. The sun and the stars            
    D. The moon and the earth
4. Light travels about _____ kilometers per second.
    A. 380,000      
    B. 100,000      
    C. 400,000      
    D. 190,000
5. Which of the following is TRUE?
    A. All the things you can see give off light.
    B. Light from the book is much shorter than that from the moon.
    C. The moment you open your eyes, the light from the book travels to your eyes.
    D. Light travels so fast that there is no time for you to read.
練習冊系列答案
相關習題

科目：初中英語 來源：廣東省茂名市2007年初中畢業(yè)考試與高中階段學校招生考試英語試卷 題型：050

閱讀理解

　　At the moment, it may be difficult to imagine, but many people believe that, by the year 2100, we will live on the planet Mars．Our own planet, Earth, is becoming more and more crowed and polluted．Luckily, we can start again and build a better world on Mars．Here is what life could be like．

　　First of all, transport shouldnbe much better．At present, our spaceships are too slow to carry large numbers of people to Mars－it takes months．However, by 2100, spaceship can travel at half the speed of ligh．It might take us two or three days to get to Mars!

　　Secondly, humans need food, water and air to live．Scientists should be able to develop plants that can be grown on Mars．These plants will produce the food and air that we need．However, can these plants produce water for us? There is no answer now．

　　There is a problem for us to live on Mars．Mars pukkss us much less than the Earth does．This will be dangerous because we could easily jump too high and fly slowly away into space．To prevent this, humans on Mars have to wear special shoes to make themselves heavier．

　　Life on Mars will be better than that on Earth in many ways, People will have more space．Living in a large building with only 10 bedrooms is highly possible．Many people believe that robot will do most of our work, so we have more time for our hobbies．

　　There will probably be no school on Mars．Every studetn will have a computer at home which is connected to the internet．They can study, do their homework and take exams in online schools．Each student will also have their own online teacher called“e-teacher”．

　　However, in some ways, life on Mars may not be better than that on the earth today．Food will not be the same－meals will probably be in the form of pills and will not be as delicious as they are today, Also, space travel will make many people feel ill．The spaceship will travel fast but the journey to Mars will probably be very uncomfortable．

(1)

According to the text, by the year 2100, some of us will possibly live ________．

[　　]

A．

on Mars

B．

on the moon

C．

under the sea

D．

in the sun

(2)

So far, how long will it take us from the earth to Mars by spaceship?

[　　]

A．

Two or three days

B．

A few months

C．

A few days

D．

A few years

(3)

In the future, the students on Mars ________．

[　　]

A．

will study mainly through the internet

B．

will study mainly in a classroom

C．

will meet each other face to face every day

D．

needn’t study at all

(4)

Life on Mars will be better than life on the earth because ________．

[　　]

A．

only a few people will live there

B．

there will be more space and less work to do

C．

there will be much delicious food

D．

all students don’t need to do any homework

(5)

According to the text, which of the following about Mars is NOT true?

[　　]

A．

Transport will be much better and faster．

B．

We need to develop a special plant which can produce water．

C．

On Mars, we can jump higher than on the earth．

D．

Food will be much more tasty．

查看答案和解析>>

同步練習冊答案