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  When did you last see a polar bear? On a trip to a zoo, perhaps? If you had attended a winter activity in New York a few years ago, you would have seen a whole polar bear club. These "Polar Bears" are people who meet frequently in the winter to swim in freezing cold water. That day, the air temperature was 3℃, and the water temperature was a bit higher. The members of the Polar Bear Club at Coney Island, New York are usually about the age of 60. Members must satisfy two requirements. First, they must get along well with everyone else in the group, this is very important because there are so many different kinds of people in the club. Polar Bears must also agree to swim outdoors at least twice a month from November through February.
  Doctors do not agree about the medical effects of cold-water swimming. Some are worried about the dangers of a condition in which the body's temperature drops so low that finally the heart stops. Other doctors, however, point out that there is more danger of a heart attack during summer swimming because the difference between the air temperature and water temperature is much greater in summer than in winter.
The Polar Bears themselves are satisfied with the benefits (or advantages) of cold-water swimming. They say that their favorite form of exercise is very good for the circulatory system(循环系统) because it forces the blood to move fast to keep the body warm. Cold-water swimmers usually turn bright red after a few minutes in the water. A person who turns blue probably has a very poor circulatory system and should not try cold-water swimming.
  The main benefits(or advantages) of cold-water swimming are probably mental. The Polar Bears love to swim year-round; they find it fun and relaxing. As one 70-year-old woman says. "When I go into the water, I pour my troubles into the ocean and let them float away."
51. The members of the Polar Bear Club must meet the following requirements except that_____ .
 A. they should be easy to make friends with
 B. they must swim outdoors at least 8 times in the four cold months
 C. they must agree to swim outdoors from November through February
 D. they must reach the age of 60
52. Doctors _____ .
 A. encourage people to take part in cold-water swimming actively
 B. point out the possible danger of blood illness during cold-water swimming
 C. believe swimming is helpful both in winter and in summer
 D. have different ideas about the medical effects of cold-water swimming
53. According to the passage, some doctors believe it is true that _____ .
 A. you are healthy if cold-water swimming turns your skin color blue
 B. cold-water swimming causes more heart attacks in summer than in winter
 C. cold-water swimming can make the body temperature dangerously high
 D. Polar Bears are bears swimming in freezing water
54. The Polar Bears like to swim all the year round, for _____ .
 A. they can remain young   B. it is an easy way to keep the body warm in winter
 C. they find it enjoyable and interesting D. they might meet fewer troubles in life
55. The passage is mainly about _____ .
a group of cold-water swimming lovers                  B. the polar bears' life  
 C. doctors' ideas about cold-water swimming            D. the requirements of the Polar Bear Club
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科目:高中英语 来源:不详 题型:完形填空


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科目:高中英语 来源:不详 题型:阅读理解

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科目:高中英语 来源:不详 题型:阅读理解


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A
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科目:高中英语 来源:不详 题型:阅读理解


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阅读下列短文,从每题所给的四个选项(A、B、C、D)中,选出最佳选项。
A
A Subway Superhero
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科目:高中英语 来源:不详 题型:阅读理解


C
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Ancient sailors used sails to capture the wind and explore the world. Farmers once used windmills to grind their grains and pump water. Today, more and more people are using wind turbines to make electricity from the breeze. Over the past decade, wind turbine use has increased at more than 25 percent a year. Still, it only provides a small part of the world's energy.
Most wind energy comes from turbines that can be as tall as a 20-story building and have three 200-foot-long (60-meter-long) blades. These devices look like giant airplane propellers(螺桨)on a stick. The wind spins the blades, which turn a shaft connected to a generator.
The biggest wind turbines generate enough electricity to supply about 600 U.S. homes. Wind farms have tens and sometimes hundreds of these turbines lined up together in particularly windy spots, like along a ridge. Smaller turbines set up in a backyard can produce enough electricity for a single home or small business.
Wind is a clean source of renewable energy that produces no air or water pollution. And since the wind is free, operational costs are nearly zero once a turbine is erected. Mass production and technology advances are making turbines cheaper, and many governments decrease tax to encourage wind-energy development.
Some people think wind turbines are ugly and complain about the noise the machines make. The slowly rotating blades(螺旋风片) can also kill birds and bats, but not nearly as many as cars, power lines, and high-rise buildings do. The wind is also changeable: If it's not blowing, there's no electricity generated.
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D. The noise the turbines make may discourage people from building them.
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A. 电动机                 B. 发电机                    C. 机翼                       D. 飞机引擎
65. If the USA wants to build wind turbines in an area with 30,000 homes, how many
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A. 50.                          B. 150.                         C. 250.                         D. 200.
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科目:高中英语 来源:不详 题型:阅读理解


E
Everyone has heard of the San Andreas fault (断层), which constantly threatens California and the West Coast with earthquakes. But how many people know about the equally serious New Madrid fault in Missouri?
Between December of 1811 and February of 1812, three major earthquakes occurred, all centered around the town of New Madrid, Missouri, on the Mississippi River. Property damage was severe. Buildings in the area were almost destroyed. Whole forests fell at once, and huge cracks opened in the ground, allowing smell of sulfur (硫磺)to filter upward.
The Mississippi River itself completely changed character, developing sudden rapids and whirlpools. Several times it changed its course, and once, according to some observers, it actually appeared to run backwards. Few people were killed in the New Madrid earthquakes, probably simply because few people lived in the area in 1811; but the severity of the earthquakes are shown by the fact that the shock waves rang bells in church towers in Charleston, South Carolina, on the coast. Buildings shook in New York City, and clocks were stopped in Washington, D.C.
Scientists now know that America’s two major faults are essentially different. The San Andreas is a horizontal boundary between two major land masses that are slowly moving in opposite directions. California earthquakes result when the movement of these two masses suddenly lurches (倾斜) forward.
The New Madrid fault, on the other hand, is a vertical fault; a some point, possibly hundreds of millions of years ago, rock was pushed up toward the surface, probably by volcanoes under the surface. Suddenly, the volcanoes cooled and the rock collapsed, leaving huge cracks. Even now, the rock continues to settle downwards, and sudden sinking motions trigger (触发) earthquakes in the region. The fault itself, a large crack in this layer of rock, with dozens of other cracks that split off from it, extends from northeast Arkansas through Missouri and into southern lllinois.
Scientists who have studied the New Madrid fault say there have been numerous smaller quakes in the area since 1811; these smaller quakes indicate that larger ones are probably coming, but the scientists say have no method of predicting when a large earthquake will occur.
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A. the New Madrid fault in Missouri
B. the San Andreas and the New Madrid faults
C. the causes of faults
D. current scientific knowledge about faults
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A. a horizontal fault            
B. a vertical fault
C. a more serious fault than the San Andreas fault
D. responsible for forming the Mississippi River
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A. it is probably as dangerous to live in Missouri as in California
B. the New Madrid fault will eventually develop a mountain range in Missouri
C. California will become an island in future
D. A big earthquake will occur to California soon
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A. horizontal faults are more dangerous than vertical faults.
B. Vertical faults are more dangerous than horizontal faults
C. Earthquakes occur only around fault areas
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科目:高中英语 来源:不详 题型:阅读理解


B
At the middle school level, there are many academic clubs in which students can participate. Students can choose clubs that focus on an area of interest.
Mathcounts Club
Mathcounts tries to increase excitement towards mathematic achievement. It hopes to provide students with the foundation for success in science, technology, engineering and mathematics careers. Schools select individuals and teams to participate in competitions. Local competitions are held in February with winners progressing to state competitions and then on to the national level. Mathcounts works to challenge student math skills, develop self-confidence and give rewards for their achievements.
Envirothon
The Envirothon program focuses on natural resources knowledge and exposes students to diverse environmental issues, ecosystems, and topography. The ecology field competition for five-member middle school teams offers competitions in wildlife, soils, forestry, current environmental issues and aquatics. Students work and learn in middle school clubs and can compete at the local and state level.
Future Problem Solvers
Future Problem Solvers is an academic club that uses a six-step process to solve problems that may happen in the future. Students who are in the talented and gifted program, who like to “think out of the box,” or who enjoy thinking about futuristic problems may like this club. Teams comprised of four students read future scenes and write up solutions in a booklet using the six-step process. Teams that score high enough can go to the state competition and then to the international competition.
Builders Club
Builders Club is open to any middle school student who wishes to perform community service. Each Builders Club is co-sponsored by a Kiwanis club and the middle school. The members learn by doing, and they learn organization, teamwork, and leadership. Builders Clubs can sponsor a "Teacher of the Year" program, provide a recycling collection point, organize canned food and clothing drives to support local shelters, adopt a resident at a local senior citizens home, adopt a highway, tutor, etc.
Middle school academic clubs offer students a place to explore interests or talents. The clubs they join in middle school can help guide choices in high school and beyond.
59.The students who are not interested in competitions woudld like to choose        .
A.Mathecounts Club    B.Builders Club
C.Future Problem Solvers   D.Envirothon
60.Why do some of the students choose Mathcounts Club?
A.To be successful in science careers.
B.To enjoy solving future problems.
C.To perform community service.
D.To study wildlife and soils.
61.What is the common feature of the four clubs?
A.Competitions.            B.Sponsorship.   
C.Scientific researches.       D.Teamwork.
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