职称英语综合类考试复习资料 7.doc

请点击右上角的分享按钮与好友共享Lakes, Too, Feel Global Warming Theres no doubt: In the last few decades, the average temperature on Earth has been higher than it has been in hundreds of years. Around the world, people are starting to measure the effects of global warming-and trying to figure out what to do about it. Scientists recently used satellites to study the temperatures of lakes around the world, and they found that lakes are heating up. Between 1985 and 2009, satellites recorded the nighttime temperatures of the surfaces of 167 lakes. During those 24 years, the lakes got warmer-by an average of about 0.045 degree Celsius per year. In some places, lakes have been warming by as much as 0.10 degree Celsius per year. At that rate, a lake may warm by a full degree Celsius in just 10 years. That difference may seem small-you might not even notice it in your bath. But in a lake, slightly warmer temperatures could mean more algae（水藻）, and algae can make the lake poisonous to fish. The study shows that in some regions, lakes are warming faster than the air around them. This is important because scientists often use measurements of air temperature to study how Earth is warming. By using lake temperatures as well, scientists can get a better picture of global warming. The scientists say data on lakes give scientists a new way to measure the impact of climate change around the world. Thats going to be useful, since no country is too big or too small to ignore climate change. Scientists arent the only ones concerned Everyone who lives on Earth is going to be affected by the rapid warming of the planet. Many world leaders believe we might be able to do something about it, especially by reducing the amount of greenhouse（温室）gases we put into the air. Thats why the United Nations started the Framework Convention on Climate Change or UNFCCC. Every year the convention meets, and representatives from countries around the world gather to talk about climate change and discuss global solutions to the challenges of a warming world.16. Scientists have been keeping records of lake temperatures for over 30 years A. Right B. Wrong C. Not mentioned17 The temperatures of lakes around the world have increased greatly between 1985 and 2009. A. Right B. Wrong C. Not mentioned18. Lakes seem to be warming faster in Asia. A. Right B. Wrong C. Not mentioned19. A slight temperature increase in a lake could be harmful to fish. A. Right B. Wrong C. Not mentioned20 Scientists generally focus on air temperatures when studying global warming. A. Right B. Wrong C. Not mentioned21. Global warming is less threatening to small countries. A. Right B. Wrong C. Not mentioned22. UNFCCCs annual meeting will be held in Mexico this year. A. Right B. Wrong C. Not mentionedAre You Getting Enough Sleep? What happens if you dont get enough sleep? Randy Gardner, a high school student in the United States, wanted to find out. He designed an experiment on the effects of sleeplessness for a school science project. With doctors watching him carefully, Gardner stayed awake for 264 hours and 12 minutes. Thats eleven days and nights without sleep! What effect did sleeplessness have on Gardner? After 24 hours without sleep, Gardner started having trouble reading and watching television. The words and pictures were too blurry（模糊）. By the third day, he was having trouble doing things with his hands. By the fourth day, Gardner was hallucinating(产生幻觉). For example, when he saw a street sign, he thought it was a person. He also imagined he was a famous football player. Over the next few days, Gardners speech became so slurred(不清楚) that people couldnt understand him. He also had trouble remembering things. By the eleventh day, Gardner couldnt pass a counting test. In the middle of the test he simply stopped counting. He couldnt remember what he was doing. When Gardner finally went to bed, he slept for 14 hours and 45 minutes The second night he slept for twelve hours, the third night he slept for ten and one-half hours, and by the fourth night, he had returned to his normal sleep schedule. Even though Gardner recovered quickly, scientists believe that going without sleep can be dangerous. They say that people should not repeat Randys experiment. Tests on white rats have shown how serious sleeplessness can be. After a few weeks without sleep, the rats started losing their fur（皮毛） And even though the rats ate more food than usual, they lost weight. Eventually the rats died. During your lifetime, you will probably spend 25 years or more sleeping But why? What is the purpose of sleep? Surprisingly, scientists dont know for sure. Some scientists think we sleep in order to replenish (补充) brain cells. Other scientists think that sleep helps the body to grow and to relieve stress. Whatever the reason, we know that it is important to get enough sleep.16. Randy Gardner studied the effects of over-sleeping.A. Right B. Wrong C. Not mentioned17 During the experiment, Gardner slept for two hours every night. A. Right B. Wrong C. Not mentioned18. During the experiment, Gardner had trouble speaking clearly. A. Right B. Wrong C. Not mentioned19. It took four days for Gardner to recover from the effects 9f the experiment. A. Right B. Wrong