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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(变成)heat(热能).The darder the colour is, the less light is reflected, the more light is taken in. So dard-coloured(深色的)clothes are warmer in the sun than light-coloured clothes.
73.When something reflects light, we can_______.
A.see its colour
B.see its heat.
C.not see its colour
D.see nothing
74.Something looks white because it reflects______.
A.some light
B.no light
C.all light
D.most light
75.The dark-coloured clothes are warm because______is taken in.
A.more light
B.less light
C.more colour
D.less colour
76.In summer_____make people feel cool.
A.dark-clolured clothes
B.red-coloured clothes
C.green-coloured clothes
D.light-coloured clothes
77.What’s the best title(题目)of this passage(短文)?
A.Dark colour
B.Colour
C.Heat
D.Clothes
查看习题详情和答案>>你们班同学就近来连续发生的校车事故进行了讨论，请你根据下列表格的内容，以School Bus Ｓafety 为题，给某英文报纸写一篇短文。
| 主要原因 | １. ２. 缺乏监管…… |
| 解决办法 | １. 政府重视…… ２. 提高安全意识…… ３. …… |
超载，超速……注意：１.可结合现实情况适当发挥，使行文连贯。
２词数为120左右。（开头已写好，不计入总词数）
超载： overload 监管： supervision
School Bus Ｓafety
Recently a series of severe school bus accidents came as a shock to everyone
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查看习题详情和答案>>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 (变成)heat (热能).The darder
the colour is, the less light is reflected, the more light is taken in. So dard-coloured (深色的) clothes are
warmer in the sun than light-coloured clothes.
B. see its heat.
C. not see its colour
D. see nothing
B. no light
C. all light
D. most light
B. less light
C. more colour
D. less colour
B. red-coloured clothes
C. green-coloured clothes
D. light-coloured clothes
B. Colour
C. Heat
D. Clothes