Using too much water or throwing rubbish into our rivers are clear ways that hum
题型：不详难度：来源：
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 |
答案
小题1:C
小题2:B
小题3:D
小题4:D
解析
主旨大意：这是一篇关于用水问题的议论文。告诉我们，尽管大量用水和污染水源使人类用水处于危险境地，但是人类一些小型的活动也对用水问题有着巨大的影响。短文详细描写了生活中容易造成浪费的一些用水问题，并提出了相应的建议。
小题1:细节题，根据The more roads and parking lots we pave , the less water can ｆlow into the ground to become groundwater. 可知选Ｃ。
小题2:细节题。根据第一段good management can help to make sure there is enough water to meet our basic needs及下文描述，可知要满足我们的用水需求需要很大的努力, 故选B。
小题3:细节题。根据You can take steps to save water in your home. 及本段描述，可知本段主要是针对如何节水提出建议，选Ｄ。
小题4:这篇短文主要描述了人类活动与水资源的关系，告诉我们如何来节约用水。故选Ｄ，人类活动如何影响我们的用水供应。
【考点定位】关于用水问题的说明文阅读
举一反三
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 |
" I"d use it if I were hanging out with friends at 3 a. m. and going to the bar and wanted to see what was open," said Walter Choo, 40, of Fort Greene.
The smartphone-like glasses will likely come out this year and cost between $250 and $600, the Times said, possibly including a variation of augmented(增强的) reality, a technology already available on smartphones and tablets (平板电脑) that overlays information onto the screen about one"s surroundings. So, for example, if you were walking down a street, indicators would pop up showing you the nearest coffee shop or directions could be plotted out and come into view right on the sidewalk in front of you.
" As far as a mainstream consumer product, this just isn"t something anybody needs," said Sam Biddle, who writes for Gizmodo.com. " We"re accustomed to having one thing in our pocket to do all these things," he added, "and the average consumer isn"t gonna be able to afford another device (装置) that"s hundreds and hundreds of dollars. "
9to5Google publisher Seth Weintraub, who has been reporting on the smartphone-like glasses since late last year, said he is confident that this type of wearable device will eventually be as common as smartphones.
"It"s just like smartphones 10 years ago," Weintraub said. "A few people started getting emails on their phones, and people thought that was crazy. Same kind of thing. We see people bending their heads to look at their smartphones, and it"s unnatural," he said. " There"s gonna be improvements to that, and this a step there. "
小题1:One of the possible functions of the smartphone-like glasses is to ____.
| A． program the opening hours of a bar |
| B． supply you with a picture of the future |
| C． provide information about your surroundings |
| D． update the maps and GPS in your smartphones |
| A．develop rapidly | B．get round quickly |
| C．appear immediately | D．go over automatically |
| A．necessary for teenagers |
| B．attractive to New Yorkers |
| C．available to people worldwide |
| D．expensive for average consumers |
| A．may have a potential market |
| B．are as common as smartphones |
| C．are popular among young adults |
| D．will be improved by a new technology |
Using a web camera equipped in Jennifer’s Los Angeles apartment, the monitor in Phoenix tracked how frequently her eyes moved from the computer screen and listened for the secret sounds of a possible helper in the room. Her Internet access was locked - remotely - to prevent Internet searches , and her typing style was analyzed to make sure she was who she said she was: Did she enter her student number at the same speed as she had in the past? Or was she slowing down?
In the battle against cheating, this is the cutting edge and a key to encourage honesty in the booming field of online education. The technology gives trust to the entire system, to the institution and to online education in general. Only with solid measures against cheating, experts say, can Internet universities show that their exams and diplomas are valid - that students haven’t just searched the Internet to get the right answers.
Although online classes have existed for more than a decade, the concern over cheating has become sharper in the last year with the growth of "open online courses." Private colleges, public universities and corporations are jumping into the online education field, spending millions of dollars to attract potential students, while also taking steps to help guarantee honesty at a distance.
Aside from the web cameras, a number of other high-tech methods are becoming increasingly popular. Among them are programs that check students’ identities using personal information, such as the telephone number they once used.
Other programs can produce unique exam by drawing on a large list of questions and can recognize possible cheaters by analyzing whether difficult test question are answered at the same speed as easy ones. As in many university classes, term papers are scanned against some large Internet data banks for cheating.
小题1:Why was Jennifer watched in an online exam?
| A．To correct her typing mistakes. |
| B．To find her secrets in the room. |
| C．To prevent her from slowing down. |
| D．To keep her from dishonest behaviors. |
| A．advanced technique | B．sharpening tool |
| C．effective rule | D．dividing line |
| A．they can attract potential students | B．they can defeat academic cheating |
| C．they offer students online help | D．they offer many online courses |
| A．checking the question answering speed |
| B．producing a large number of question |
| C．scanning the Internet test question |
| D．giving difficult test question |
| A．The Advantages of Online Exams |
| B．The High-tech Methods in Online Courses |
| C．The Fight against Cheating in Online Education |
| D．The War against the Booming of Online Education |
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