The oldest and most common source(来源) of renewaBle energy known to man, Biomass
题型：不详难度：来源：
According to the Union of Concerned Scientists(UCS), Biomass is a kind of renewaBle energy source that produces no carBon dioxide(二氧化碳), Because the energy it contains comes from the sun. When plant matter is Burned, it gives off the sun’s energy. In this way, Biomass serves as a sort of natural Battery(电池) for storing the sun’s energy. As long as Biomass is produced continuously ----with only as much grown as is used--- the “Battery” lasts forever.
According to the Energy Information Administration, Biomass has Been one of the leading renewaBle energy sources in the United States for several years running through 2007, making up Between 0.5 and 0.9 percent of the nation’s total electricity supply. In 2008----although the numBers aren’t all in yet----wind power proBaBly took over first place Because of the rapid development of wind farms across the country.
Producing power from Biomass helps reduce some 11 million tons of carBon dioxide each year. Some homeowners also try to make their own heat By using Biomass materials. Such practice may save homeowner’s money, But it also produces a lot of pollution. So, the Best way is to encourage power plants to use it.
小题1:Why is Biomass considered as “ a sort of natural Battery”?
| A．It Burns merely plant matter. | B．It keeps producing electricity. |
| C．It stores the energy from the sun. | D．It produces zero carBon dioxide. |
| A．Wind power would Be the leader of renewaBle energy. |
| B．there was a rapid growth of electricity production |
| C．Biomass might Become the main energy source |
| D．0.5~0.9 of power supply came from Biomass |
| A．To prevent the waste of energy. | B．To increase production safety. |
| C．To reduce pollution. | D．To save money. |
| A．A research plan. | B．A science magazine |
| C．A Book review. | D．A Business report. |
答案
小题1:C
小题2:A
小题3:C
小题4:B
解析
文章大意：本文是一篇科技说明文。文章介绍了biomass(生物量)的特征、生物量的优点以及它在美国能源中的地位。
小题1:细节理解题。根据第二段中的“because the energy it contains comes from the sun.When plant matter is burned, it gives off the sun"s energy.In this way, biomass serves as a sort of natural battery for storing the sun"s energy.”可知C正确。
小题2:推理判断题。根据第三段中的“In 2008—although the numbers aren"t all in yet—wind power probably took over first place because of the rapid development of wind farms across the country.”可知，2008年风能占居首位。关键词定位：A项中的the leader of 和first place为同意表达。
小题3:推理判断题。根据最后一段中的“Some homeowners also try to make their own heat by using biomass materials.Such practice may save homeowners" money, but it also produces a lot of pollution.So, the best way is to encourage power plants to use it.”可知C正确。
小题4:推理判断题。根据全文内容可知，本文是一篇有关生物量能源的科普类文章。所以，它应该是科学杂志上的文章。故选B。
举一反三
People who multitask all the time may be the worst at doing two things at once, a new research suggests. The findings, based on performances and self-evaluation by about 275 college students, indicate that many people multitask not out of a desire to increase productivity, but because they are easily distracted (分心) and can’t focus on one activity. And “those people turn out to be the worst at handling different things,” said David Sanbonmatsu, a psychologist at the University of Utah.
Sanbonmatsu and his colleagues gave the students a set of tests and asked them to report how often they multitasked, how good they thought they were at it, and how sensation-seeking (寻求刺激) or imperative (冲动) they were. They then evaluated the participants’ multitasking ability with a tricky mental task that required the students to do simple mathematical calculations while remembering a set of letters.
Not surprisingly, the scientists said, most people thought they were better than average at multitasking, and those who thought they were better at it were more likely to report using a cellphone while driving or viewing multiple kinds of media at once. But those who frequently deal with many things at the same time were found to perform the worst at the actual multitasking test. They also were more likely to admit to sensation-seeking and impulsive behavior, which connects with how easily people get bored and distracted.
“People multitask not because it’s going to lead to greater productivity, but because they’re distractible, and they get sucked into things that are not as important.” Sanbonmatsu said.
Adam Gazzaley, a researcher at the University of California, San Francisco, who was not a member of the research group, said one limitation of the study was that it couldn’t find out whether people who start out less focused toward multitasking or whether people’s recognizing and understanding abilities change as a result of multitasking.
The findings do suggest, however, why the sensation-seeker who multitask the most may enjoy risky distracted driving. “People who are multitasking are generally less sensitive to risky situations.” said Paul Atchley, another researcher not in the group. “This may partly explain why people go in for these situations even though they’re dangerous.”
小题1: The research led by Sanbonmatsu indicates that people who multitask .
| A．seek high productivity constantly |
| B．prefer handling different things when getting bored |
| C．are more focused when doing many things at a time |
| D．have the poorest results in doing various things at the same time |
| A．assessed the multitasking ability of the students |
| B．evaluated the academic achievements of the students |
| C．analyzed the effects of the participants’ tricky mental tasks |
| D．measured the changes of the students’ understanding ability |
| A．limited power in calculation | B．interests in doing things differently |
| C．inability to concentrate on one task | D．impulsive desire to try new things |
| A．drive very skillfully |
| B．go in for different tasks |
| C．fail to react quickly to potential dangers |
| D．refuse to explain the reasons for their behavior |
Human activity is not responsible for all water shortages(短缺). Drier climates are of course more likely to have droughts(干旱) than areas with more rainfall, but in any case, good management can help to make sure there is enough water to meet our basic needs.
Thinking about the way we use water every day can make a big difference, too In the United States , a family of four can use 1. 5 tons of water a day! This shows how much we depend on water to live, but there’s a lot we can do to lower the number.
You can take steps to save water in your home. To start with use the same glass for your drinking water all day. Wash it only once a day. Run your dishwasher (洗碗机)only when it is full 。Help your parents fix any leaks in your home. You can even help to keep our water supply clean by recycling batteries instead of throwing them away.
小题1:Which of the following is most likely to lead to less groundwater?
| A．Using river water. | B．Throwing batteries away. |
| C．Paving parking lots. | D．Throwing rubbish into lakes. |
| A．All water shortages are due to human behavior. |
| B．It takes a lot of effort to meet our water needs. |
| C．There is much we can do to reduce family size. |
| D．The average family in America makes proper use of water. |
| A．show us how to fix leaks at home |
| B．tell us how to run a dishwasher |
| C．prove what drinking glass is best for us |
| D．suggest what we do to save water at home |
| A．Why paving roads reduces our water |
| B．how much we depend on water to live |
| C．why droughts occur more in dry climates |
| D．how human activity affects our water supply |
The designer says he come up with the idea after watching people get wet on streets in Russia. “once, I was driving on a central Saint Petersburg street and saw the street lamps lighting up people trying to hide from the rain. I thought it would be appropriate to have a canopy(伞蓬)built into a street lamp.” he said.
The lampbrella is a standard-looking street lamp fitted with an umbrella canopy. It has a built-in electric motor which can open or close the umbrella on demand. Sensors(传感器)then ensure that the umbrella offers pedestrians shelter whenever it starts raining.
In addition to the rain sensor, there’s also a 360°motion sensor on the biberglass street lamp which detects whether anyone’s using the lampbrella. After three minutes of not being used the canopy is closed.
According to the designer, the lampbrella would move at a relatively low speed, so as not to cause harm to the pedestrians. Besides, it would be grounded to protect from possible lighting strike. Each lampbrella would offer enough shelter for several people. Being installed at 2 meters off the ground, it would only be a danger for the tallest of pedestrians.
While there are no plans to take lampbrella into production, Belyacv says he recently introduced his creation one Moscow Department, and insists this creation could be installed on any street where a lot of people walk but there are no canopies to provide shelter.
小题1:For what purpose did Belyacv create the lampbrella?
| A．To predict a heavy rain | B．To check the weather forecast |
| C．To protect people from the rain | D．To remind people to take an umbrella |
| A．His creation was inspired by an experience |
| B．it rains a lot in the city of Saint Petersburg |
| C．Street lamps are protected by canopies |
| D．He enjoyed taking walks in the rain |
| A．motor→canopy→sensors | B．Sensors→motor→canopy |
| C．motor→sensors→canopy | D．canopy→motor→sensors |
| A．Its moving speed | B．Its appearance |
| C．Its installation | D．Its safety |
| A．The designer will open a company to promote his product |
| B．The lampbrella could be put into immediate production |
| C．The designer is confident that his creation is practical |
| D．The lampbrella would be put on show in Moscow |
If a diver surfaces too quickly, he may suffer the bends. Nitrogen (氮) dissolved (溶解) in his blood is suddenly liberated by the reduction of pressure. The consequence, if the bubbles (气泡) accumulate in a joint, is sharp pain and a bent body—thus the name. If the bubbles form in his lungs or his brain, the consequence can be death.
Other air-breathing animals also suffer this decompression (减压) sickness if they surface too fast: whales, for example. And so, long ago, did ichthyosaurs. That these ancient sea animals got the bends can be seen from their bones. If bubbles of nitrogen form inside the bone they can cut off its blood supply. This kills the cells in the bone, and consequently weakens it, sometimes to the point of collapse. Fossil (化石) bones that have caved in on themselves are thus a sign that the animal once had the bends.
Bruce Rothschild of the University of Kansas knew all this when he began a study of ichthyosaur bones to find out how widespread the problem was in the past. What he particularly wanted to investigate was how ichthyosaurs adapted to the problem of decompression over the 150 million years. To this end, he and his colleagues traveled the world’s natural-history museums, looking at hundreds of ichthyosaurs from the Triassic period and from the later Jurassic and Cretaceous periods.
When he started, he assumed that signs of the bends would be rarer in younger fossils, reflecting their gradual evolution of measures to deal with decompression. Instead, he was astonished to discover the opposite. More than 15% of Jurassic and Cretaceous ichthyosaurs had suffered the bends before they died, but not a single Triassic specimen (标本) showed evidence of that sort of injury.
If ichthyosaurs did evolve an anti-decompression means, they clearly did so quickly—and, most strangely, they lost it afterwards. But that is not what Dr Rothschild thinks happened. He suspects it was evolution in other animals that caused the change.
Whales that suffer the bends often do so because they have surfaced to escape a predator (捕食动物) such as a large shark. One of the features of Jurassic oceans was an abundance of large sharks and crocodiles, both of which were fond of ichthyosaur lunches. Triassic oceans, by contrast, were mercifully shark- and crocodile-free. In the Triassic, then, ichthyosaurs were top of the food chain. In the Jurassic and Cretaceous, they were prey (猎物) as well as predator—and often had to make a speedy exit as a result.
小题1:Which of the following is a typical symptom of the bends?
| A．A twisted body. |
| B．A gradual decrease in blood supply. |
| C．A sudden release of nitrogen in blood. |
| D．A drop in blood pressure. |
| A．how often ichthyosaurs caught the bends |
| B．how ichthyosaurs adapted to decompression |
| C．why ichthyosaurs bent their bodies |
| D．when ichthyosaurs broke their bones |
| A．confirmed his assumption | B．speeded up his research process |
| C．disagreed with his assumption | D．changed his research objectives |
| A．failed to evolve an anti-decompression means |
| B．gradually developed measures against the bends |
| C．died out because of large sharks and crocodiles |
| D．evolved an anti-decompression means but soon lost it |
However, the scale and speed of this growth seem set to destroy the very things tourists want to enjoy. In those countries where there was a rush to make quick money out of sea-side holidays, over-crowded beaches and the concrete jungles of endless hotels have begun to lose their appeal.
Those countries with little experience of tourism can suffer most. In recent years, Nepal set out to attract foreign visitors to fund developments in health and education. Its forests, full of wildlife and rare flowers, were offered to tourists as one more untouched paradise. In fact, the nature all too soon felt the effects of thousands of holiday-makers traveling through the forest land. Ancient tacks became major routes for the walkers, with the consequent exploitation of precious trees and plants.
Not only can the environment of a country suffer from the sudden growth of tourism. The people as well rapidly feel its effects. Farmland makes way for hotels, roads and airports; the old way of life goes. The one-time farmer is now the servant of some multi-national organization; he is no longer his own master. Once it was his back that bore the pain; now it is his smile that is exploited. No doubt he wonders whether he wasn"t happier in his village working his own land.
Thankfully, the tourist industry is waking up to the responsibilities it has towards those countries that receive its customers. The protection of wildlife and the creation of national parks go hand in hand with tourist development and in fact obtain financial support from tourist companies. At the same time, tourists are being encouraged to respect not only the countryside they visit but also its people.
The way tourism is handled in the next ten years will decide its fate and that of the countries we all want to visit. Their needs and problems are more important than those of the tourist companies. Increased understanding in planning world-wide tourism can preserve the market for these companies. If not, in a few years’ time the very things that attract tourists now may well have been destroyed.
小题1:What does the author indicate in the last sentence of Paragraph 1?
| A．The Pacific Island is a paradise. | B．The Pacific Island is worth visiting. |
| C．The advertisement is not convincing. | D．The advertisement is not impressive |
| A．its natural resources are untouched |
| B．its forests are exploited for farmland |
| C．it develops well in health and education |
| D．it suffers from the heavy flow of tourists. |
| A．They are happy to work their own lands. |
| B．They have to please the tourists for a living. |
| C．They have to struggle for their independence. |
| D．They are proud of working in multi-national organizations. |
| A．The number of tourists | B．The improvement of services. |
| C．The promotion of new products. | D．The management of tourism |
| A．optimistic | B．doubtful | C．objective | D．negative |
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