Question

(D)

You can not 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 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 bodies. The moon, for example, does not give off any light of its own. It is non-luminous. You see it because sunlight falls on it and some of it reflects in our direction. So moon light is only second hand sunlight.

When you look at a book, it sends to your eyes some of the light which falls on it, and you see the book. If light could be kept out from where you are so that there would be no light for 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 so 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 sunlight

C．it has light of its own                     D．your eyesight can get to it

2.The underlined word “l(fā)uminous” means_______.

A．visible            B．a(chǎn)ll colors          C．giving off light      D．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.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.

5.This article is probably from _________ .

A．a(chǎn) science magazine                      B．a(chǎn) medical magazine

C．a(chǎn) biography                            D．a(chǎn) story book.

 

Answer 1

【答案】

1.B

2.C

3.C

4.C

5.A

【解析】

試題分析：本文主要介紹光線的原理，以及人們?yōu)槭裁茨軌蚩匆娢矬w?是因為物體能夠反射光線。

1.B 細節(jié)題。根據(jù)文章第二段第一行When you look at a book, it sends to your eyes some of the light which falls on it, and you see the book.可知書本反射太陽光是人看清書的主要原因。故B正確。

2.C 推理題。根據(jù)The sun, the stars, a lighted lamp are examples that can be seen by their own light. Such things are luminous.說明太陽這樣的物體是發(fā)光體，該詞是指發(fā)光的。故C項正確。

3.C 細節(jié)題。根據(jù)文章第一段第2行The sun, the stars, a lighted lamp are examples that can be seen by their own light.可知太陽和一些恒星是發(fā)光體。故C正確。

4.C 細節(jié)題。根據(jù)文章最后一段1,2行Light travels so fast that the time in which it travels from the book you are reading to your eyes is so short as if there were no time at all.可知光線從書本到眼睛的時間很短。好像一睜開眼睛，就能夠看見一樣，故C正確。

5.A 推理題。本文屬于科普類短文，主要介紹光線的原理，故最可能是從科學雜志里看到這樣的文章。故A正確。

考點：考查科普類短文閱讀

點評：本文主要介紹光線的原理，以及人們?yōu)槭裁茨軌蚩匆娢矬w?是因為物體能夠反射光線。文章基本上是考查細節(jié)題，對此類題型考生可以首先從問題中找到關鍵詞，然后以此為線索，運用略讀及查閱的技巧在文中迅速尋找這一細節(jié)，找到后再把這一部分內(nèi)容仔細閱讀一遍，仔細比較所給選項與文中細節(jié)的細微區(qū)別，在準確理解細節(jié)的前提下，最后確定最佳答案。