题目内容
Look into the mirror and what do you see? You see yourself. But when you move. you do everything backward(相反地)in the mirror! If you wave your left hand, your right hand waves in the mirror. If you wink your right eye, your left eye, your left eye winks(眨). Try to read a page in the mirror .The words will be backwards.What is really happening? You do not see through the glass of a mirror as you do through a window. The glass of a mirror has a silver coating on the back. The light from the sun or a bulb bounces (弹回)off you ,goes into the mirror ,and bounces straight back out to you again.
Mirrors have been used for thousands of years. The earliest were round pieces of shiny metal. Glass mirrors came late. The ancients thought that a mirror was magic. They did not understand how it worked. They thought they saw their spirits in a mirror and breaking a mirror brought bad luck.
Today mirrors have many uses .For example, they can make rooms look bigger and prettier. They also show us if our hair is combed(梳理) well and our faces are clean. On cars, buses and trucks, mirrors help drivers see traffic behind them. Mirrors are also used in telescopes(望远镜)and searchlights(探照灯).
Fun houses use mirrors. They make people look funny. Some mirrors are curved to make people seem short and round or tall and tin They make people laugh at themselves.
【小题1】If you wave your right hand, you can see your In the mirror.
| A．left hand down | B．left hand wave |
| C．right hand wave | D．right hand up |
| A．appeared a long time ago |
| B．were made of glass at first |
| C．made of metal are popular today |
| D．had many uses in ancient times |
| A．people thought they could see their spirits in mirrors |
| B．they were used in magic shows |
| C．they could make people change their heights and weights |
| D．they could make people laugh |
| A．雕刻 | B．油漆 | C．扭转 | D．弯曲 |
【小题1】B
【小题1】A
【小题1】A
【小题1】D解析:
略
口算心算速算应用题系列答案
同步拓展阅读系列答案In the sea there are many islands. In its warm waters there are some little ones. We call them coral(珊瑚) islands.
A coral island is very nice to look at. It looks like a ring of land with trees, grass, and flowers on it. One part of the ring is open to the water. There is a little round lake inside the island.
If you look into this lake, you will see beautiful coral. You may think they are flowers.
If you look at a piece of coral, you will see many little holes in it. In each of these holes a very small sea animal has lived. These sea animals make the coral.
They began to build under the water. Year after year, the coral grew higher and higher. At last it grew out of the water.
Then the sea brought to it small trees and something else. After some years, these things changed into earth. Sometimes the wind brought seeds to this earth. Sometimes birds flew over it and brought seeds to the island. The little seeds grew. In a few years there were plants all over the island. In a few more years there were trees growing there.
So you see, these islands were built little by little. The workers were very small. Don’t they teach us a lesson? Can you think what the lesson is?
【小题1】 In the sea _____.
| A．there are no coral islands | B．there are some coral islands |
| C．the water is always warm | D．we can see many flowers and fishes |
| A．a round cake | B．trees, grass and flowers | C．a ring of land | D．a round lake |
| A．flowers | B．little corals | C．grass | D．sea animals |
| A．The wind and birds brought them to the coral islands. |
| B．Only the wind brought them there. |
| C．People brought them there. |
| D．Fishes brought them there. |
| A．small workers can’t do big things |
| B．only big workers can do big things |
| C．small workers can do big things if they work hard and work a long time |
| D．all small things can do things |