Question

What is colour? Why do some of the things around us look red, some green, others blue?

Colours are really made by reflected (反射) light. We see colour because most of the things reflect light. Something is red, for it reflects most of the red light. In the same way, if something is green, it reflects most of the green light. If something reflects all light, it is white. If it doesn’t reflect any light, it is black.

Some of the light is reflected and some is taken in (吸收) and turned into heat. The darker the colour is, the less light is reflected, the more light is taken in. So dark-coloured clothes are warmer in the sun than light-coloured clothes.

1.When something reflects light, we can _______ .

A. see its colour       B. see its heat

C. not see its colour    D. see nothing

2.The dark-coloured clothes are warm because _________ is taken in.

A. more light        B. less light

C. more colour       D. less colour

3.In summer ________ make people feel cool.

A. dark-coloured clothes     B. red-coloured clothes

C. green-coloured clothes    D. light-coloured clothes

Answer

1.A

2.A

3.D

【解析】

试题分析：短文大意：颜色是由反射光形成的。我们能看到颜色，因为大部分的东西反射光。一些光被反射，一些被吸收变成热。颜色越深，反射的光越少。穿深色衣服比浅色的衣服温暖。

1.第二段第二句We see colour because most of the things reflect light.可知我们能看到颜色是因为大部分的东西反射光，所以该选A。

2.第三段第二句The darker the colour is, the less light is reflected, the more light is taken in可知颜色越深，反射的光越少，而吸收的光越多，所以该选A。

3.第二段中If something reflects all light, it is white.可知白色可以反射各种光，因此在夏天穿白色衣服会让人感觉凉爽，所以该选D。

考点：科普类阅读。