题目内容
Light and shadow（影子）are friends．They usually go together．We receive light every day．At the same time, we produce shadow．
Light cannot shine through you．Your body stops it from passing．There is a dark spot（斑点）on the ground next to you．The light cannot reach the dark spot．This is your shadow．
At noon the sun shines over your head．Your body stops very little light reaching the ground．So your shadow is quite short．
But in early morning or late afternoon the sun is low in the sky． Its light moves over more of your body．Then your shadow is quite long．Your body keeps a lot of light from reaching the ground．
We love light, especially（尤其）sunlight．Without sunlight, life on earth is impossible．Most of us like to stand in the shadow of a tree in summer．But some people are afraid of their own shadow at night．They do not want to walk in a dark street．They do not want to see the shadow, either．But still light and shadow usually go together．
1．The sentence “Light and shadow are friends” means ________．
A．the shadow produce light
B．the light usually follows the shadow
C．they usually get on well with each other
D．when we get light, we can get shadow． They are always together
2．Light cannot shine through you because ________．
A．it is too weak
B．your body stops it from traveling on
C．your body is tall and strong
D．there is a dark spot on the ground next to you
3．Your body's shadow is long because ________．
A．the sun is low in the sky in the morning or late afternoon
B．the sun is over your head
C．your body stops very little light reaching the ground
D．the sunlight is very strong at noon
4．It is ________ in the shadow of a tree in summer, so many people like to stay there．
A．hot B．warm C．cool D．cold
5．Which of the following is NOT true?
A．There will be no shadow without light．
B．Shadow is produced when something stops the light from passing．
C．We produce light when we receive it．
D．Many animals and plants have to live on sunlight．
DBACC
小学生10分钟口算测试100分系列答案The moon moves around the earth. It makes one trip in about four weeks. The moon looks flat to us. But it is a round ball, like the earth.
People once thought the moon had fire on it. They thought the fire made it bright. Now we know the moon is like a mirror. It gets its light from the sun.
Our sunlight comes from the sun, too. What is the sun? The sun is a star. The stars we can see have their own light. There are many big stars we cannot see. Their light had burned out. Others are still bright, but they are so far away that we cannot see them. The sun looks bigger and much brighter than other stars because it is the nearest of all stars. The sun and the other stars we see are very hot, but the air around us saves us from the heat of the sun.
The sun gives us light and warmth. It makes plants grow and turns leaves green. It makes life possible on our earth. It is a life giving star.
【小题1】 It takes _______ for the moon to go around the earth.
| A．more than a week | B．nearly a month | C．half a year | D．more than a year |
| A．there is some fire on it | B．it is near the sun, too |
| C．there is a big mirror on it | D．it can get light from the sun |
| A．the sun is not the biggest star | B．the sun is bigger than any other star |
| C．only the sun can shine | D．the sun is one of the farthest stars to us |
| A．Because it gives us warmth. |
| B．Because there are some living things on it. |
| C．Because plants and animals can't live without it. |
| D．Because people have to live in the dark without it. |
What will the house of the future look like? Architects (建筑师) believe that there are all possibilities. The only thing for sure is that the house will be as green as possible.
The tree house
Many architects in the world would like to build a “tree house.” Like a leaf, the surface (表面) of the house collects sunlight during the day. The energy can be used to heat water, produce electricity, and even create fresh air for the home. The “root” of the house is deep under the ground.
The lizard (蜥蜴) house
Like a lizard, changing color with the weather is the most important design of a lizard house. When it’s in the bright sun, the cover of the house will turn dark to protect it from strong heat. During dark days, it turns white and takes in as much light and heat as possible to produce energy.
Meals at home
It has gardens on the outside wall of the house. People can plant tomatoes, carrots and green tea on them. So every day in the morning, you just need to walk outside and collect your meals.
Learning from the past
Looking to the future isn’t the only way to be green. Sometimes, ancient techniques (古老的技术) can also help cut down energy use. For example, a chimney can be a useful air conditioner because it is easier for hot air to flow out at the chimney.
【小题1】We can heat water, produce electricity or create fresh air for the home _________.
| A．with a leaf from the tree |
| B．with the energy from sunlight |
| C．with gardens on its wall |
| D．with the door in the house |
| A．It will take in light. | B．It will produce energy. |
| C．It will turn dark. | D．It will turn white. |
| A．tomatoes | B．potatoes | C．carrots | D．green tea |
| A．Future life | B．Green house of the future |
| C．Different houses | D．Energy saving in the future |
Fire can help people in many ways. But it can also be very harmful. Fire can make water hot and house warm, give light and cook food. But fire can burn (燃烧) things, too. It can make trees, houses, animals and other things catch fire (起火). If some people can't run away from fire, it can kill them. This happens in every country every year.
Sometimes big fire can burn forests. A month ago, a large forest fire broke out in Yunnan Province. It lasted nearly half a month. The forest in Heilongjiang Province and the grassland in Inner Mongolia caught fire in May, 2006. After more than ten days' fight, over 30,000 people and soldiers put out (扑灭) the fire at last.
Nobody knows clearly when people began to make fire, but there are many interesting stories about the first time a man or a woman started a fire. One story from Australia tells about a man who went to the sun and brought fire down a long time ago. Today people know how to make a fire with matches (火柴). Children sometimes like to play with them. But matches can be very dangerous. The match can burn a piece of paper and then it can burn a house. A small fire can become a big fire, and destroy many things. Fire kills many people every year. So you must be careful with fire.
1.The main idea of the passage is that _________.
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A．fire is dangerous and harmful |
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B．forest fire can be easily put out |
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C．who started a fire the first time |
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D．every month there is a forest fire in Yunnan Province |
2.Matches can be dangerous because _________.
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A．they always burn a house |
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B．they can make things catch fire |
|
C．they can burn a piece of paper |
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D．they kill many animals every year |
3.The word “destroy” in the passage means ________in Chinese.
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A．破灭 |
B．炸毁 |
C．毁灭 |
D．粉碎 |
4.The writer of the passage wants to tell us that ________.
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A．we know when man began to make a fire |
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B．people should use fire carefully |
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C．fire can burn down all things in the world |
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D．all children like to play with matches |