2008年职称英语阅读理解习题(2)

The Wasteland

A new catastrophe faces Afghanistan. The American bombing campaign is co iring with years of civil conflict and drought to create an environmental crisis.

Humanitarian and political concer  are dominating the headlines. But they are also masking the disa earance of the country's once rich habitat and wildlife, which are quietly being crushed by war. The UN is di atching a team of investigators to the region next month to evaluate the damage. “A health environment is a prerequisite for rehabilitation,” says Klaus Topfer, head of the UN environment Programme.

Much of south-east Afghanistan was once lush forest watered by mo oon rai . Forests now cover le  than 2 per cent of the country. “The worst deforestation occurred during Talibab rule, when its timber mafia denuded forests to sell to Pakistani markets,” says Usman Qazi, an environmental co ultant based in Quetta, Pakistan. And the inte e bombing intended to flush out the last of the Taliban troo  is destroying or burning much of what remai .

The refugee crisis is also wrecking the environment, and much damage may be irreversible. Forests and vegetation are being cleared for much-needed farming, but the gai  are likely to be only short-term. “Eventually the land will be unfit for even the most basic form of agriculture,” war  hammad Naqi of the World Wide Fund for Nature in Pakistan. Refugees—around 4 million as the last count—are also cutting into forests for firewood.

The hail of bom  falling on Afghanistan is making life particularly hard for the country's wildlife. Birds such as the pelican and endangered Siberian crane cro  eastern Afghanistan as they follow one of the world's great migratory thoroughfares from Siberia to Pakistan and India. But the number of the birds flying acro  the region has dro ed by a staggering 85 per cent. “Cranes are very se itive and they do not use the route if they see any danger,” says Ashiq Ahgmad, an environmental scientist for the WWF in Peshawar, Pakistan, who has tracked the colla e of the birds migration this winter.

The rugged mountai  also usually provide a safe have for mountain leopards, gazelles, bears and Marco Polo sheep—the world's largest  ecies. “The same terrain that allows fighters to strike and disa ear back into the hills has also historically enabled wild life to survive,” says Peter Zahler of the Wildlife Co ervation society, based in New York. But he war  they are now under inte e pre ure from the bombing and invasio  of refugees and fighters.

For i tance, some refugees are hunting rare  ow leopards to buy a safe pa age acro  the border. A single fur can fetch $2,000 on the black market, says Zahler. Only 5,000 or so  ow leopards are thought to survive in central Asia, and le  than 100 in Afghanistan, their numbers already decimated by exte ive hunting and smuggling into Pakistan before the conflict. Timber, falco  and medicinal plants are also being smuggled acro  the border. The Talibab once controlled much of this trade, but the recent power vacuum could exacerbate the problem.

Bombing will also leave its mark beyond the obvious craters. Defence analysts says that while depleted uranium has been used le  in Afghanistan that in the Kosovo conflict, conventional explosives will litter the country with pollutants. They contain toxic compounds such as cyclonite, a carcinogen, and rocket propellants contain perchlorates, which damage thyroid glands.

1. All of the following are causes of the environmental crisis in Afghanistan EXCEPT
A. American bombing.
B. heavy mo oon rai .
C. years of lack of rain.
D. fighting among the Afghanis.

2. According to the pa age, the main cause of the lo  of the country's forests is
A. the flooding caused by the mo oon rain.
B. the inte e bombing of the Taliban troo .
C. the improper use of the trees for benefits during Taliban rule.
D. the fire set to burn the forests by the Taliban troo .

3. Most of the migratory bird no longer fly acro  Afghanistan to Pakistan and India because
A. they change their route from time to time.
B. some birds have colla ed while flying.
C. they have been threatened by the bom  dro ed on the country.
D. they are scared by the big animals in the mountai .

4. In which of the following ways do the refugees threaten the survival of such wild animals as the  ow leopards?
A. They hunt the animals for food.
B. They fight in the rugged mountai  that provide a haven for the animals.
C. They hunt the animals to make profits.
D. They drive the animals away from their homes in the mountai .

5. Which of the following CA OT be inferred from the last paragraph?
A. Depleted uranium is not a kind of conventional explosives.
B. Craters are not the only damage done by bom .
C. The conventional bom  are no le  damaging to environment than the non-conventional ones.
D. Fewer people were killed in bombing in Afghanistan than in Kosovo.

Late-night Drinking

Coffee lovers beware. Having a quick “pick-me-up” cup of coffee late in the day will play havoc with your sleep. As well as being a stimulant, caffeine interrupts the flow of melatonin, the brain hormone that sends people into a sleep.

Melatonin levels normally start to rise about two hours before bedtime. Levels then peak between 2 a.m. and 4 a.m., before falling again. “It's the neurohormone that controls our sleep and tells our body when to sleep and when to wake, ” says Maurice Ohayon of the Stanford Sleep Epidemiology Research Center at Stanford University in California. But researchers in Israel have found that caffeinated coffee halves the body's levels of this sleep hormone.

Lotan Shilo and a team at the Sapir Medical Center in Tel Aviv University found that six volunteers slept le  well after a cup of caffeinated coffee than after drinking the same amount of decaf. On average, subjects slept 336 minutes per night after drinking caffeinated coffee, compared with 415 minutes after decaf. They also took half an hour to drop off4—twice as long as usual—and jigged around in bed twice as much.

In the second phase of the experiment, the researchers woke the volunteers every three hours and asked them to give a urine sample. Shilo measured concentratio  of a breakdown product of melatonin. The results suggest that melatonin concentratio  in caffeine drinkers were half those in decaf drinkers. In a paper accepted for publication in Sleep Medicinc, the researchers suggest that caffeine blocks production of the enzyme that drives melatonin production.

Because it can take many hours to eliminate caffeine from the body, Ohayon recommends that coffee lovers switch to decaf after lunch.

1．The author mentio  “pick-me-up” to indicate that
A. melatonin levels need to be raised.
B. neurohormone can wake us up.
C. coffee is a stimulant.
D. decaf is a caffeinated coffee.

2. Which of the following tells us how caffeine affects sleep?
A. Caffeine blocks production of the enzyme that sto  melatonin production.
B. Caffeine interrupts the flow of the hormone that prevents people from sleeping.
C. Caffeine halves the body's levels of sleep hormone.
D. Caffeine stays in the body for many hours.

3. What does paragraph 3 mainly discu ?
A. Different effects of caffeinated coffee and decaf on sleep.
B. Different findings of Lotan Shilo and a team about caffeine.
C. The fact that the subjects slept 415 minutes per night after drinking decaf.
D. The evidence that the subjects took half an hour to fall asleep.

4.What does the experiment mentioned in paragraph 4 prove?
A. There are more enzymes in decaf drinkers' urine sample.
B. there are more melatonin concentratio  in caffeine  drinkers' urine sample.
C. Decaf drinkers produce le  melatonin.
D. Caffeine drinkers produce le  sleep hormone.

5. The author of this pa age probably agrees that
A. coffee lovers sleep le  than those who do not drink coffee.
B. we should not drink coffee after su er.
C. people sleep more soundly at midnight than at 3 a.m.
D. if we feel sleepy at night, we should go to bed immediately.

Pool Watch

Swimmers can drown in busy swimming pools when lifeguards fail to notice that they are in trouble. The Royal Society for the Prevention of Accidents says that on average 15 people drown in British pools each year, but many more suffer major injury after getting into difficulties. Now a French company has developed an artificial intelligence system called Poseidon that sounds the alarm when it sees someone in danger of drowning.

When a swimmer sinks towards the bottom of the pool, the new system sends an alarm signal to a poolside monitoring station and a lifeguard's paper. In trials at a pool in Ancenis, near Nantes, it saved a life within just a few months, says Alistair MeQuade, a  okesman for its maker, Poseidon Technologies.

Poseidon kee  watch through a network of underwater and overheard video cameras. AI software analyses the images to work out swimmers trajectories. To do this reliably, it has to tell the difference between a swimmer and the shadow of someone being cast onto the bottom or side of the pool. “The underwater environment is a very dynamic one, with many shadows and reflectio  dancing around.” Says McQuade.

The software does this by “projecting” a shape in its field of view onto an image of the far wall of the pool. It does the same with an image from another camera viewing the shape from a different angle. If the two projectio  are in the same position, the shape is identified as a shadow and is ignored. But if they are different, the shape is a swimmer and so the system follows its trajectory.

To pick out potential drowning victims, anyone in the water who starts to descend slowly is added to the software's “pre-alert” list, says McQuade. Swimmers who then stay immobile on the pool bottom for 5 seconds or more are co idered in danger of drowning. Poseidon double-checks that the image really is of a swimmer, not a shadow, by seeing whether it o cures the pool's floor texture when viewed from overhead. If so, it alerts the lifeguard, showing the swimmer's location on a poolside screen.

The first full-scale Poseidon system will be officially opened next week at a pool in High Wycombe. Buckinghamshire. One man who is impre ed with the idea is Travor Baylis, inventor of the clockwork radio. Baylis ru  a company that i talls swimming pools—and he was once an underwater escapologist with a circus. “I say full marks to them if this works and can save lives,” he says. But he adds that any local authority  ending ￡30,000-plus on a Poseidon system ought to be investing similar amounts in teaching children to swim.

1. AI mea  the same as
A. an image.
B. an idea.
C. anyone in the water.
D. artificial intelligence.

2. What is required of AI software to save a life?
A. It must be able to swim.
B. It must keep walking round the pool.
C. It can distinguish between a swimmer and a shadow.
D. It can save a life within a few months.

3. How does Poseidon save a life?
A. He plunges into the pool.
B. It alerts the lifeguard.
C. He cries for help.
D. It rushes to the pool.

4. Which of the following statements about Trevor baylis is NOT true?
A. He ru .
B. He invented the clockwork radio.
C. He was once an entertainer.
D. He ru  a company.

5. The word “co idered” in paragraph 5 could be best replaced by
A. “thought”.
B. “rated”.
C. “regarded”.
D. “believed”.

点击查看更多关于 the of 的主题