really made by reflected (反射) light. We see color because most of the things reflect 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 (吸引) and turned into (变成)
heat (热能).The darker the color is, the less light is reflected, the more light is taken in. So dark-colored
clothes are warmer in the sun than light-colored clothes.
down part turn almost dark star nobody through hours cover |
阅读短文,根据其内容回答问题。 |
The idea of daylight (日光) saving time started with an American named Benjamin Franklin (1706-1790). He explained how a lot of the money spent on candles used for light (This was before electricity电) could be saved if everyone woke up earlier and went to bed earlier. Even though Franklin"s idea had a clear meaning, most people didn"t want to get up earlier than they had to. Who would? An Englishman named William Willet didn"t come up with a way to "make" the sun set (落下) later until 1907. His idea was to turn clocks forward (向前) by 20 minutes on each of the four Sundays in April, for a total (总计) of 80 minutes. William"s idea was laughed at, at first. But when World War I started in 1914, many countries decided they had to save energy (能源) for the war. Daylight saving time has other uses. The more time you spend outside playing, the less time you are spending in front of the computer or the TV. These things also use energy. Also, daylight saving time sometimes causes problems. For example, China used it in 1986 —but stopped it in 1991. That was because the temperatures are quite different from North to South and time from East to West. If the people from northwest part of China use daylight saving time, sometimes they have to get up to work when it is not very bright outside. That will cause some trouble for them. Still, most parts of the world do have daylight saving time, and most people look forward to the extra (额外的) hour of evening light. 1. Did the idea of daylight saving time start with an American named Benjamin Franklin? __________________________________________________________________ 2. In which year was the idea of daylight saving time put in use? __________________________________________________________________ 3. According to this passage, what can you do when daylight saving time is used. __________________________________________________________________ 3. Why is daylight saving time not used in China now? The country _______________________________________________________ 4. Why did Franklin give the idea of daylight saving time? _______________________________________________________ |
阅读理解。 |
New rules and behavior standards (行为规范) for middle school students came out in March. The Middle School is going to use a new way to decide who the top students are. The best students won"t only have high marks. They should not dye (染) their hair, smoke or drink because they are students. The following are some of the new rules. Have you ever copied someone else"s work in an exam? Don"t do that again! That"s not something an honest student should do. Do more at school. Good students love animals and care for other people. April is Bird-loving Month in China. Is your school doing anything to celebrate it? You should join! And you can learn more about animals and how to protect them. Be friendly to the people around you. Try to think of others, not only yourself. Be open to new ideas. Do you think people can live on the moon? Maybe you"ll find another earth someday. Don"t look down on new ideas. Everyone"s ideas are important. You should welcome them, because new ideas make life better for everyone. Protect yourself. Has someone ever taken money from one of your classmates? Don"t let it happen to you. If you have to go home late, you should let your parents know. Use the Internet carefully. The Internet can be very useful for students. But some things on the Internet aren"t for children, so try to look at web pages (网页) that are good for you. |
1. What"s the meaning of "look down on " in the passage? |
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A. 向下看 B. 轻视 C. 在……上面看 D. 上下打量 |
2. If you go home late, you should tell your about it. |
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阅读理解。 |
Birds Journeys The wish that shows birds to begin their journeys, and the highly exact feeling of direction shown by traveling birds, stay among the most puzzling mysteries of science. The Arctic tern and the golden plover are two examples of these unusual birds. In the north during the springtime, traveling birds return to the Arctic (北极) from southern areas. The longest journey is made by the unbelievable Arctic tern. This amazing bird is no larger than a crow (a kind of bird) , but its body surface (outside) is more updated. The tern is called the long-distance champion of the bird world, often traveling 23,000 miles a year between West Africa and the Arctic. Such journeys take weeks, with stops for food and rest. There are no rests, however, for the golden plover, a non-stop flyer among Arctic birds. The plover"s journey is like that of a land plane over water, since the plover cannot land on the water to rest. Without stopping, the golden plover flies 2,000 miles from Hawaii to Alaska or from South America to Nova Scotia and northern Canada. This little bird (only eleven inches) is fat and strong when traveling north, but is thin and weak when it arrives after fighting ocean winds for sixty or more hours. |
1. Look at the first paragraph. What does the underlined word "mysteries"mean? |
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A. 秘密 B. 神秘 C. 机密 D. 隐秘 |
2. What do the tern and the plover have in common? |
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阅读理解。 |
How Long Can People Live? |
1. What does the story of Jeanne Calment prove (证明) to us? |
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A. People can live to 122. B. Old people are creative. C. Women are sporty at 85. D. Women live longer than men. |
2. According to Steve Austad at the University of Texas, _______. |
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