题目
题型：不详难度：来源：
This exciting research is just beginning. And in the meantime, companies are also experimenting with adding vitamins, minerals, medicines, and other substances that could give gum the power to cure headaches and fight everything from serious diseases to bad breath.
Other researchers are finding that gum might work better than a pill to deliver medicines and other substances into the bloodstream. That’s because the lining (膜) of our cheeks can absorb certain substances more quickly than our stomachs and intestines (肠) can.
That discovery could help other researchers develop medicine-containing gums that fight colds, ease headaches, battle nervousness, and more. Scientists might even create antimicrobial (抗菌的) gums that cure bad breath.
Those projects may take years, but gum scientists have already had at least one recent success: They’ve created a gum that could help us stay awake.
Researchers have produced a gum called Stay Alert. Each stick has as much caffeine as a cup of coffee. It can take an hour for the caffeine in coffee to have its full effect, but the caffeine in Stay Alert hits in just a few minutes.
The gum is easy to transport and it’s stable in cold and hot climates. Unlike a pill, it doesn’t require water to swallow. Those qualities make it easy for soldiers to use.
For now, Stay Alert is available only to the military (军队). The manufacturer may one day offer it for sale to the public. People who work at night, such as truck drivers and medical personnel who ride in ambulances, might benefit from a product like Stay Alert.
小题1: The passage mainly talks about _____.
| A．the rule of forbidding chewing gum in school |
| B．new research on chewing gum |
| C．different kinds of chewing gum |
| D．the relationship between chewing gum and medicine |
| A．Touches. | B．Attacks. | C．Takes effect. | D．Affects badly. |
| A．stay awake | B．fight colds |
| C．cure headaches | D．overcome nervousness |
| A．stay Alert is not easy to store |
| B．stay Alert needs water to swallow |
| C．stay Alert is available to the public now |
| D．we can’t buy gums that cure bad breath now |
答案
小题1:B
小题1:C
小题1:A
小题1:D
解析
核心考点
试题【Most schools forbid chewing gum, but in a few years they might consider changing】；主要考察你对题材分类等知识点的理解。[详细]
举一反三
Dr Rajendra Pachauri, chair of the United Nations Intergovernmental Panel on Climate Change, said that people should then go on to reduce their meat consumption even further.
Pachauri, who was re-elected the panel’s chairman for a second six-year term last week, said diet change was important because of the huge greenhouse gas emissions (排放) and other environmental problems associated with raising cattle and other animals. “It was relatively easy to change eating habits compared to changing means of transport,” he said.
The UN’s Food and Agriculture Organisation has estimated that meat production accounts for nearly a fifth of global greenhouse gas emissions. These are produced during the production. For example, ruminants (反刍动物), particularly cows, give off a gas called methane, which is 23 times more effective as a global warming agent than CO2.
Pachauri can expect some opposite responses from the food industry to his advice, though last night he was given unexpected support by Masterchef presenter and restaurateur John Torode. “I have a little bit and enjoy it,” said Torode. “Too much for any person is bad. But there’s a bigger issue here: where the meat comes from. If we all bought British and stopped buying imported food, we’d save a huge amount of carbon emissions.”
Professor Robert Watson, the chief scientific adviser for the Department for Environment Food and Rural Affairs, said government could help educate people about the benefits of eating less meat, but it should not regulate. “Eating less meat would help, there’s no question about that,” Watson said.
However, Chris Lamb, head of marketing for pig industry group BPEX, said the meat industry had been unfairly targeted and was working hard to find out which activities had the biggest environmental impact and reduce them. “Some ideas were contradictory,” he said. “For example, one solution to emissions from cattle and other animals was to keep them indoors, but this would damage animal welfare. Climate change is a very young science and our view is there are a lot of simple solutions being proposed.”
小题1:What is directly related to global warming?
| A．Consumption of meat. | B．Growth of cattle. |
| C．Methane from ruminants. | D．Processing of meat. |
| A．Rajendra Pachauri. | B．John Torode. | C．Robert Watson. | D．Chris Lamb. |
| A．we should try to keep away from cattle | B．ruminants should not be left outdoors |
| C．the meat industry will soon close down | D．we must do our duty to save the earth |
| A．Less meat, slower global warming |
| B．More animals, more greenhouse gas |
| C．Less imported food, better our environment |
| D．Greater diet change, smaller climate change |
Mary’s story is not unusual in Britain. According to the latest government figures, pupil absences are rising, despite schools taking a hard line on truancy (逃学).
Dr Philip James from Cardiff University thinks she knows why: “As schools make more efforts to find and punish missing students, students find better ways to avoid being caught.”
For several years, James has researched teenager truancy and discovered that most truancy was “a response to factors within the school”. Students that skip school are not necessarily less advanced or less intelligent. They complained of teachers who failed to engage them, and of “boring” lessons. “Many of them really enjoy school and believe in education, but drop out when aspects of it are ineffective.” James says.
The views of students like Adam, who believes that skipping lessons has little impact on his schooling, are common. “I only take off for a lesson, or a couple of days. It doesn’t affect my education,” he told James.
James believes that schools need to address the question of why pupils want to leave in the first place. “Pupils need help from the start.” she says. “Schools need to look at the reasons for truancy rather than the number, so that instead of walking away from school, students have the skills and chances to talk through problems and make a change.”
小题1:What is one of the reasons that many students skip school according to James’ study?
| A．They feel they have fallen behind in their studies. |
| B．They have no interest in school education. |
| C．They now have more interesting things to do. |
| D．They find some lessons and teachers uninteresting. |
| A．experiencing a problem with | B．having a strict attitude towards |
| C．finding it difficult to deal with | D．having little success with |
| A．school education needs improvement |
| B．good students also need a break from school |
| C．schools need to pay more attention to truancy |
| D．many students believe occasional truancy isn’t serious |
| A．Fire all their unqualified teachers. |
| B．Improve communication with students. |
| C．Develop better ways to discover truancy. |
| D．Introduce more serious punishments. |
A study of 192 third and fourth graders, generally aged eight and nine, found that children who cut the number of hours spent watching television gained nearly two pounds(0.9kg) less over a one-year period than those who did not change their television diet.
"The findings are important because they show that weight loss can only be the result of a reduction in television viewing and not any other activity," said Thomas Robinson, a pediatrician(儿科专家) at Stanford University.
"American children spend an average of more than four hours per day watching television and videos or playing video games, and rates of childhood being very fat have doubled over the past 20 years," Robinson said.
In the study, presented this week to the Pediatric Academic Societies‘ annual meeting in San Francisco, the researchers persuaded about 100 of the students to reduce their television viewing by one-quarter to one-third.
Children watching fewer hours of television showed a significantly smaller increase in waist size and had less body fat than other students who continued their normal television viewing, even though neither group ate a special diet or took part in any extra exercise.
"One explanation for the weight loss could be the children unstuck to the television may simply have been moving around more and burning off calories," Robinson said.
"Another reason might be due to eating fewer meals in front of the television. Some studies have suggested that eating in front of the TV encourages people to eat more," Robinson said.
小题1:The author tries to tell us in the first two paragraphs that ________.
| A．children will get fatter if they eat too much |
| B．children will get thinner if they eat less |
| C．children will get fatter if they spend less time watching TV |
| D．children will get fatter if they spend more time watching TV |
| A．is more than four hours a day | B．is less than four hours a day |
| C．doubled in the last twenty years | D．is more than on any other activities |
| A．six hours | B．eight hours | C．three hours | D．one hour |
| A．Children usually eat fewer while watching TV. |
| B．Children usually eat more while watching TV. |
| C．Children eat the same amount of meals while watching TV. |
| D．Children usually eat nothing while watching TV. |
A. They usually eat more while watching TV.
B. They burn off fewer calories.
C. They change their diet while watching TV.
D. Both A and B.
But there are countries between these two kinds that normally expect snow some time over the winter months, but never receive snow regularly or in the same quantities every year. Britain is one of them, for which the arrival of snow quite simply causes problems. Within hours of the first snowfalls, however light, roads are blocked, trains and buses have to stop in the middle of the way. Normal communication is affected as well: telephone calls become difficult and the post immediately takes more time than usual. And almost within hours, there are also certain shortages----bread, vegetables and other things-----not because all these things can no longer be produced or sent to shops, but mainly because people are frightened and go out and store up with food and so on…just for fear that something bad should happen.
But why does snow have this effect? After all, the Swiss, the Austrians and the Canadians don‘t have such problems. It is simple because there is not enough planning and preparation. We need money to buy equipment to deal with snow and ice. To keep the roads clear, for example, requires snow-ploughs(扫雪机) and machines to spread salt. The reason why a country like Britain does not buy snow-ploughs is that they are used for a few days in any one year, and the money could be more useful in other things such as hospital, education, helping the old and so on..
小题1:According to the writer, Britain is a country ________.
| A．which has regular snow | B．which is not well prepared for snow |
| C．for which snow is a catastrophe | D．for which snow is a wonder |
A. shops have closed down B. people buy as much as they can
B. farmers cannot produce any more D. people eat more vegetables in winter
小题3:The words "two kinds" in the passage mean the countries ______.
| A．which have weather as yearly happening to celebrate or as rare(少见) weather |
| B．which either have heavy snow or light snow |
| C．to which snow either causes problems or no problems |
| D．which either have snow-ploughs or no snow-ploughs |
So biologists were delighted early this year when, with the help of the US Navy, they are able to track a particular blue whale for 43 days recording its sounds. This was possible because of the Navy’s former top secret system of underwater listening devices across the oceans.
Tracking whales is but one example of an exciting new world just opening to civilian scientists after the cold war as the Navy starts to share and partly uncover its global network of underwater listening system built over the decades to track the ships of potential enemies.
Earth scientists announced at a news conference recently that they had used the system for closely observing a deep-sea volcanic eruption for the first time and that they planned similar studies. Other scientists have proposed to use the network for tracking ocean currents and measuring changes in the ocean and global temperatures. Different layers of ocean water can act as channels for sounds focusing them in the same way a stethoscope(听诊器) does when it carries faint noises from a patient’s chest to a doctor’s ear. This focusing is the main reason that even relatively weak sounds in the ocean, especially low-frequency ones, can often travel thousands of miles.
小题1:The underwater listening system was originally designed _________________.
| A．to trace and locate enemy ships |
| B．to observe deep sea volcanic eruptions |
| C．to study the movement of ocean currents |
| D．to replace the global radio communications network |
| A．the ability of sound to travel at high speed |
| B．the top-level technology of focusing sounds under water |
| C．the unique characteristic of layers of ocean water in carrying sound |
| D．low-frequency sounds traveling across different layers of water |
| A．New radio devices are developed for tracking the blue whales. |
| B．Blue whales are no longer endangered with the new system. |
| C．Opinions differ on the use of military technology. |
| D．Military technology has great potential in civilian use. |
| A．An effort to protect an endangered marine species. |
| B．The civilian use of a military detection system. |
| C．The exposure of a US Navy top-secret weapon. |
| D．A new way to look into the behavior of blue whales. |
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