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You can’t 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.But most of the things you see are not giving off light of their own.They are just reflecting(反射)light that falls on them from the sun or some other luminous bodies.The moon,for example,doesn’t give off any light of its own.It is not 1uminous.You see it because sunlight falls on it and some of the sunlight reflects on the earth.So moonlight is only second—hand sunlight.
When you look at a book,it sends some of the light which fails on it to your eyes,and you see the book.If light could be kept out from where you’re so that there would be no light from the book to reflect.Then you couldn’t see the book even with your eyes wide open.Light travels so fast that the time in which it travels from the book you’re reading to your eyes is as short as if there were no time at time.Light reaches us from the moon,which is about 380,000 kilometres away,in only a little more than a second.
小题1:You can see the book because________.
A.your eyes are close to itB.it reflects some of the light
C.it has light of its ownD.it is big enough to be seen
小题2:The Chinese meaning of the world“luminous”is close to_______.
A.闪光的B.看不见的C.发光的D.明亮的
小题3:________has light of its own.
A.The moonB.The earthC.The sunD.The satellite of Dong Fong Hong
小题4:Light travels about_________kilometers per second.
A.300,000B.100,000C.400,000D.190,000
小题5:Which of the following is TRUE?
A.All the things you can see give off light.
B.Light from the book is much faster 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.

答案

小题1:B
小题1:C
小题1:C
小题1:A
小题1:C
解析

小题1:根据You can’t see any object unless light from that object gets into your eyes.可知选B。Y
小题1:根据from the sun or some other luminous bodies 可知选C,太阳是发光的。
小题1:根据They are just reflecting(反射)light that falls on them from the sun 可知太阳本身发光,故选C。
小题1:根据Light reaches us from the moon,which is about 380,000 kilometres away,in only a little more than a second.一秒钟多点传播380,000,那么一秒钟应该比这个少一点,故选A。
小题1:通过阅读可知,当你睁开眼睛时,光线就从书本上传播的你的眼中,故选C,其它选项与短文描述不符。
核心考点
试题【You can’t see any object unless light from that object gets into your eyes.Some 】;主要考察你对教育文化类等知识点的理解。[详细]
举一反三
Long ago, Bluebird’s feathers were the colour of dust. She did not like her ugly colour. She was attracted by the colour of the lake near her home. It was as blue as the sky after a storm. Bluebird wanted to be the colour of that beautiful lake very much. Flapping her wings one morning, Bluebird flew from her tree to the blue lake. Then she bathed in the water three times. After each bath, she sang, “Blue water. Still water. I went in. I am blue.” Bluebird repeated this every morning. On the third day, she came out of the lake with beautiful blue feathers.
Now Coyote was a trickster(骗子)—and hungry too. He stayed behind Bluebird’s tree for a long time every day and watched her go to the lake. He pretended(伪装) to be interested in everything she did. He wanted Bluebird for lunch, but he was afraid of the blue water. On the third morning, Coyote saw Bluebird come out of the lake with beautiful blue feathers. Impressed, he sat next to Bluebird’s tree and waited for her. When she returned, he asked, “How did you get blue feathers? I want to be blue like the mountains too.” Bluebird didn’t believe Coyote, but she taught him how to bathe three times each morning and how to sing her song. Coyote did what she said, and after three days of bathing in the lake, his white fur turned deep blue.
Convinced(确信的) that blue fur was even more beautiful than blue feathers, Coyote forgot all about being hungry. He ran as fast as he could to the top of the hill. Standing on his back legs, he raised his front legs off the ground and howled. But Coyote slipped(滑倒) and rolled down the hill. He couldn’t stop himself, and the dust and dirt covered his new blue fur. He rolled and rolled until he hit into Bluebird’s tree heavily. No matter how much he tried, foolish Coyote could not shake the dust from his fur. And so the fur of all coyotes had the dull colour of dust to this very day.
小题1:How many times did Bluebird bathe every morning before she had beautiful blue feathers?
A.Three times.B.Four times.C.Five times.D.Six times.
小题2:Why was Coyote a trickster?
A.He wanted to fly like Bluebird near the mountains.
B.He wanted to eat Bluebird but pretended to be curious.
C.He wanted to swim in the lake but was afraid of the water.
D.He wanted to sing Bluebird’s song but didn’t know the words.
小题3:Where did Coyote go after his fur turned blue?
A.To the lake.B.To the tree.C.To the cave.D.To the hill.
小题4:Why did Coyote forget all about being hungry?
A.Because his fur had the dull colour of dust.
B.Because the dust and dirt covered his new blue fur.
C.Because he thought blue fur was much more beautiful.
D.Because he hit into Bluebird’s tree and hurt himself.
小题5:What words does the writer use to help you imagine the colour blue?
A.sky, lake, mountains
B.bird, coyote, storm
C.flapped, climbed, bathed
D.fur, feathers, dust

题型:不详难度:| 查看答案
Dogs like living with people. A dog can be a very good friend. He can do a lot of things for people. Some dogs help people to look after sheep, other dogs help them to find lost children. And some of the dogs can help the blind (盲人) do things.
Many years ago there was a very good dog. His name was Seeing Eye dog. Now we can see this kind of dogs all over the world. They are working for the blind.
The Seeing Eye dog is strong, good and easy to train(训练). He helps the blind to walk from place to place.
Before a dog becomes a Seeing Eye dog, he must go to a training school for about three months. First the dog has to learn to sit or stay when he hears the trainer’s call. In his next lesson the dog learns to make his trainer across busy streets
The dog has many things to learn. And in every lesson he must learn to do one thing again and again for many times.
At the end of the training school he must take tests. When he passes the tests, the Seeing Eye dog will do the things by himself.
Now he can help blind people. The new master may be a man, a woman, or even a child. It takes the dog and his blind master about a month to learn to work and live together.
小题1:We can see the Seeing Eye dog _______.
A.only in the countryB.only in small cities
C.all over the worldD.only on the busy street
小题2:What can the Seeing Eye dog do?
A.Look after sheepB.Help blind people
C.Find lost childrenD.Train blind people
小题3:If you want a dog to become a Seeing Eye dog, you must let him ________.
A.go to a training schoolB.go to a middle school
C.go to an evening schoolD.go to a children school
小题4:First the dog has to learn to sit or stay __________.
A.when he hears the telephone callB.when he hears another dog’s call
C.when he hears the master’s callD.when he hears the trainer’s call
小题5:How long will it take the dog and his blind master to learn to work and live together?
A.one yearB.five yearsC.about a monthD.one week

题型:不详难度:| 查看答案
Look at the picture. What can you see? In the picture there is a big table with a lot of things on it. There are three bottles of orange juice, two glasses of milk, some bread, cakes and so on. look, there is a cat under the table. It’s Kate’s cat. Its name is Mimi. I think it like them very much. No, Mimi. You can’t have them. All the things on the table are not for you. They are for Jim and Kate. They have them for lunch. POLLY is a bird.  Now it’s on the window. It’s eating a banana.
小题1: There is a big table with ________ on it.
A.many thingsB.three bottles of orange
C.two glasses of milkD.some bread and cakes
小题2:Where is the cat? It’s _________.
A.behind the doorB.under the tableC.near the windowD.on the floor
小题3:What’s the name of Kate’s cat?
A.MimiB.PollyC.Xiao MiD.Mary
小题4:All the things on the table are for __________
A.Jim and KateB.Jim and MimiC.Jim and his fatherD.Kate and her mother
小题5:Which sentence is right ?
A.The cat is eating bread .B.Jim is having breakfast.
C.Polly is eating a banana.D.Kate is having lunch.

题型:不详难度:| 查看答案
This is my school. There are many trees and flowers in it. The teaching building is big and tall. There is a big playground in our school. After 4:30 in the afternoon, many students come to the playground to play football and some students play table tennis in the table tennis room.
There are 1,200 students in 25 classes in our school. The students all like to study. The teachers in our school are very good. They help the students to study and the students like them, too.
小题1:The school looks _____.
A.smallB.oldC.niceD.new
小题2: It’s very nice for this school to have ____.
A.trees and flowersB.a playgroundC.students and teachersD.desks and chairs
小题3: There are at least (至少) _____ students in one class.
A.45B.65C.75D.55
小题4: After class the students often go to _____.
A.their classroomB.their homesC.the playgroundD.the art room
小题5:What may teachers not do?
A.Give the students lessons.B.Play football and table tennis with the students.
C.Don’t like some students.D.Help students to study.

题型:不详难度:| 查看答案
Water is very important to living things.Without water there can be no life on the earth.All animals and plants need water.Man also needs water.We need water to drink.to cool our food and to clean ourselves.Water is needed in offices,factories and schools.
Water is needed everywhere.There is water in seas;rivers and lakes ,Water is found almost everywhere.Even in the driest part of the world.there is some water in the air.You cannot see or feel it when it is a part of the air.The water in the seas,rivers and lakes is a liquid。The water in the air is a gas,and we call it water vapor.
Clouds are made of water.They may be made of very small drops of water.They may also be made of snow crystals(结晶体).Snow crystals are very,very small crystals of ice.Ice is frozen water.It is a solid.There can be snow and ice everywhere in winter.
(   )4.Where Can we find water?
A.We can find water when it turns into vapor.
B.Water can be found almost everywhere
C.We can see water in deserts here and there.
D.Water is only in seas and rivers.
(   )5.We must protect water resources because       
A.crops need water        B.all living things need water
C.all animals need water    D.all plants need water
题型:不详难度:| 查看答案
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