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A survey basing on 1,000 students found that half of the pupils and 80% of the middle school students sleeps less than nine hours every night. Too many homework given by school teachers and parents is the main reasons. Another reason lies in students¡¯ bad habits. Some students, for example, are absent-minded while doing his homework, and some waste their after-class time. The third reason is because some students have to get up early on weekdays to get school far away from home. Experts are calling at schools and parents to cut down on the amount of homework but students should make a good use of their time. It would be better if they could choose to study in a nearby school.
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Many people like eating junk foods, because they thought they are delicious. But in fact, these foods are not healthy. That we need most is a balanced diet. Eating a balanced diet mean choosing a wide variety of foods from all the food groups. A balanced diet provides different kinds of nutrition(ÓªÑø) with our body. We need a balanced diet to keep healthy. Therefore, many people still have unhealthy eating habits, that will do harm to their health. I think is necessary for us to have three meals a day properly. When eat, we should eat different kinks of foods. For an example, we should eat both meat and vegetables to get different kinds of nutrition.
All in all, it¡¯s importantly for us to keep a balanced diet.
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¡¾ÌâÄ¿¡¿Satellites play big roles in modern life. Some look downward to monitor environmental conditions on Earth.Others look outward in search of major solar flares(Ò«°ß) that can trouble the transmission(´«ËÍ) of electrical power to homes and businesses. Some spy on our enemies. Others relay communications around the globe. But all of these million-dollar wonders of technology can be knocked out by a collision with space junk ---debris (ËéƬ )from satellites and other earthly technology orbiting high above the planet. Now,a teen from Jordan has designed a satellite to chase down space junk , collect it and then deal with it.
Even bits of space junk as small as dots of paint pose a threat , says Dana. That's because this debris orbits our planet at speeds up to some 28,200 kilometers per hour. Such high speed explains why tiny paint dots have damaged the windshields of space shuttles so badly that they needed to be replaced.
Researchers have come up with many ideas for getting rid of space junk. Some have suggested vaporizing(Õô·¢) small bits with lasers. Others have proposed launching satellites to collect the debris. Dana's design falls into this category.
Here's how hers would work : A radar system aboard the satellite would scan and find a piece of space junk.Then,thrusters(ÍƽøÆ÷)would change the satellite's orbit so that it could chase down the errant object. As the satellite closed in on its prey, cameras would keep it on target.
At the last minute,a door that leads to a container would open. This container needs to be strong so that it doesn't break apart when the satellite swallows the space junk,Dana explains. Finally,when the trash container was full,it would be lowered toward the earth on a kilometer-long cable and its contents released into the upper atmosphere. There, the space junk would harmlessly burn up just like a meteor (Á÷ÐÇ) does. Meanwhile, her satellite would roll the container back up so that it could collect more trash.
¡¾1¡¿What is focused on in the first paragraph?
A. The types of satellites being categorized into.
B. The tracks of satellites orbiting above the planet.
C. The sources of space junk coming from.
D. The danger that satellites face in space.
¡¾2¡¿Why can small pieces of space junk threaten satellites?
A. They travel at a very high speed.
B. They are difficult to track by satellites.
C. They can blow up into millions of pieces.
D. They are as soft as a ball in the air.
¡¾3¡¿The underlined words "the errant object" refer to_____.
A. the radar system that scans space junk
B. the space junk that travels in disorder
C. the satellite that doesn't keep its track
D. the camera that can't keep space junk on target
¡¾4¡¿According to the Dana's design, space junk in her satellite___________.
A. will be swallowed and stored in its trash bin
B. will be broken apart in the trash container
C. will be destroyed by heat in the upper atmosphere
D. will be transported to the earth through a cable
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¡¾ÌâÄ¿¡¿¼ÙÈçÄãÊÇÀ£¬ÄãУ½«ÓÚ±¾ÖÜÎåÉÏÎç¾ÙÐÐÌâΪ¡°Protecting wild animals¡± µÄÓ¢ÎÄÑݽ²±ÈÈü£¬Ä㽫´ú±íÄã°à²ÎÈü£¬ÇëÄãдһ·ÝÑݽ²¸å¡£ÄÚÈÝÖ÷Òª°üÀ¨£º
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Good morning,everyone!
I¡¯m more than glad to stand here and give a short speech on protecting wild animals.
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¡¾ÌâÄ¿¡¿An environmental group called the Food Commission is unhappy and disappointed because of the sales of bottled water from Japan. The water, it angrily argues in public, has traveled 10,000 ¡°food miles¡± before it reached Western customers. Transporting water halfway across the world is surely the extremely stupid use of fuel when there is plenty of water in the UK. It is also worrying that we were wasting our fuel by buying prawns from Indonesia (7,000 food miles ) and carrots from South Africa (5,900 food miles).
Counting the number of miles traveled done by a product is a strange way of trying to tell the true situation of the environmental damage due to industry. Most food is transported around the world on container ships that are extremely energy efficient. It should be noticed that a ton of butter transported 25 miles in a truck to a farmers¡¯ market doesn¡¯t necessarily use less fuel on its journey than a similar product transported hundreds of miles by sea. Besides, the idea of ¡°food miles¡± ignores the amount of fuel used in the production. It is possible to cut down your food miles by buying tomatoes grown in Britain rather than those grown in Ghana. The difference is that the British ones will have been raised in heated greenhouse and the Ghanaian ones in the open sun.
What is the idea of ¡°food miles¡± does provide, however, is the chance to cut out Third World countries from First World food markets. The number of miles traveled by our food should, as I see it, be regarded as a sign of the success of the global trade system, not a sign of damage to the environment.
¡¾1¡¿The Food Commission is angry because it thinks that ________.
A. UK wastes a lot of money importing food products
B. some imported goods causes environmental damage
C. growing certain vegetables causes environmental damage
D. people wasted energy buying food from other countries
¡¾2¡¿The phrase ¡°food miles¡± in the passage refers to the distance ________.
A. that a food product travels to a market
B. that a food product travels from one market to another
C. between UK and other food producing countries
D. between a Third World country and a First World food market
¡¾3¡¿By comparing tomatoes raised in Britain and in Ghana, the author tries to explain that ________.
A. British tomatoes are healthier than Ghanaian ones
B. Ghanaian tomatoes taste better than tomatoes ones
C. cutting down food miles may not necessarily save fuel
D. protecting the environment may cost a lot of money
¡¾4¡¿From the passage we know that the author is most probably ________.
A. a supporter of free global trade
B. a member of a Food Commission
C. a supporter of First World food markets
D. a member of an energy development group
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¡¾1¡¿Your company produces a new product, which is worth_________(advertise).
¡¾2¡¿We will hold a party to celebrate my grandparents¡¯ golden wedding tomorrow, for they have been______(marry) for 50 years.
¡¾3¡¿She was so weak_________she was out of breath after walking for only a few minutes.
¡¾4¡¿Mary pretended not __________(know) me when we met in the street the other day.
¡¾5¡¿The Chinese government is still looking for all possible s__________to the problem of unemployment.
¡¾6¡¿__________ the years passed, great changes took place in the personal computer revolution.
¡¾7¡¿This kind of bird is rarely seen in the area because they are being hunted without __________ (ÈÊ´È¡¢Á¯Ãõ).
¡¾8¡¿As you know, we should pay special attention to __________ (±£»¤)these young trees from being damaged.
¡¾9¡¿Our football team¡¯s __________ (±íÏÖ)has been excellent during the whole year.
¡¾10¡¿Love is the most __________ (attract) power in the universe.
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¡¾ÌâÄ¿¡¿Over the years I¡¯ve been teaching kids about a simple but powerful concept¡ªthe ant philosophy, an¡¾1¡¿(amaze) four-part philosophy.
First, ants never quit. If they're heading somewhere and you try to stop them, they'll climb over. they'll climb under, or they'll climb around. They never give up¡¾2¡¿(look) for a way to get where they¡¾3¡¿(suppose) to go! Second, ants think about winter and summer.They are always gathering in their winter food in the middle of summer and they are making¡¾4¡¿. (prepare) for the long cold winter.So you have to think about storms in summer; think about rocks¡¾5¡¿you enjoy the sand and sun. Third, ants think about summer all winter.During the winter, they remind¡¾6¡¿(they), "This won't last long and we'll soon be out of here. " On¡¾7¡¿first warm day, the ants are out. If it¡¾8¡¿(turn) cold again, they'll dive back down. But they come out again if it is warm Last,how much will an ant gather during the summer to prepare for the winter? All that it¡¾9¡¿(possible) can.¡¾10¡¿you can learn from the ant philosophy is: Never give up, look ahead, stay positive and do all you can.
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¡¾1¡¿The two parties held the talk in a friendly __________(Æø·Õ).
¡¾2¡¿The storm didn¡¯t cause much ___________(Ëðʧ).
¡¾3¡¿I am not sure what I would do if I were in your __________(ְλ).
¡¾4¡¿He got an __________(¾Þ´óµÄ) amount of money by winning the first prize in lottery.
¡¾5¡¿The bridge is under ____________(½¨Éè). We have to choose another road to the town.
¡¾6¡¿William started off on the wrong foot by having an _________(ÕùÂÛ) with the manager on his first day at work.
¡¾7¡¿There is clear ___________(Ö¤¾Ý) that the company is losing money.
¡¾8¡¿He decided to _________(´ÇÖ°) and give up the chance to be a manager because of poor health.
¡¾9¡¿It is widely believed that the world will serve as a bridge for cultural __________(½»Á÷) between the countries.
¡¾10¡¿This kind of car has not distinctive _________(Ìصã) except for consuming a small amount of petrol.
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