[单项选择]Passage Three

There are hidden factors which scientists call "feedback mechanisms". No one knows quite how they will interact with the changing climate. Here’s one example: plants and animals adapt to climate change over centuries. At the current estimate of half a degree centigrade of warming per decade, vegetation may not keep up. Climatologist James Hansen predicts climate zones will shift toward the poles by 50 to 75 kilometers a year--faster than trees can naturally migrate. Species that find themselves in an unfamiliar environment will die. The 1000-kilometer-wide strip of forest running through Canada, Russia, and Scandinavia could be cut by half. Millions of dying trees would soon lead to massive forest fires, releasing tons of CO2 and further boosting global warming. There are dozens of other possible "feedback mechanism A. how plants and animals adapt to hidden factors B. how plants and animals interact with the changing climate C. how climate changes D. how climate zones shift 查看答案 更多"Passage Three There are h"的相关试题: [单项选择]Passage Three There are hidden factors which scientists call "feedback mechanisms". No one knows quite how they will interact with the changing climate. Here’s one example: plants and animals adapt to climate change over centuries. At the current estimate of half a degree centigrade of warming per decade, vegetation may not keep up. Climatologist James Hansen predicts climate zones will shift toward the poles by 50 to 75 kilometers a year--faster than trees can naturally migrate. Species that find themselves in an unfamiliar environment will die. The 1000-kilometer-wide strip of forest running through Canada, Russia, and Scandinavia could be cut by half. Millions of dying trees would soon lead to massive forest fires, releasing tons of CO2 and further boosting global warming. There are dozens of other possible "feedback mechanism A. some feedback mechanisms may stow down global warming B. the basic facts of global warming are unknown C. developing countries benefit from cheap fossil fuels D. developed countries have decided to reduce their energy consumption 查看答案 [单项选择]Passage Three Musicians are fascinated with the possibility that music may be found in nature; it makes our own desire for art seem all the more essential. Over the past few years no less a bold musical explorer than Peter Gabriel has been getting involved. At the Research Center in Atlanta, Georgia, he has been making music together with Kanzi, one of the bonobo apes (倭黑猩猩) involved in the long-term language acquisition studies of Sue and Duane Savage-Rumbaugh. I have seen the video of Kanzi picking notes out on a piano-like keyboard, with Gabriel and members of his band playing inside the observation booth in the lab. (They did it this way because Kanzi had bitten one of his trainers a few days previously—interspecies communication is not without its dangers. ) The scene is beautiful, the ape trying out the new machine and looking thought A. is a bold expert on animal behavior B. wants to find more about natural music C. is working on animal’s language ability D. specializes in human-animal cooperation 查看答案 [单项选择] Passage One For three decades we’ve heard endlessly about the virtues of aerobic(increasing oxygen consumption)exercise. Medical authorities have praised running and jumping as the key to good health, and millions of Americans have taken to the treadmill(踏车) to reap the rewards. But the story is changing. Everyone from the American Heart Association to the surgeon general’s office has recently embraced strength training as a complement to aerobics. And as weight lifting has gone mainstream, so has the once obscure practice known as "Super Slow" training. Enthusiasts claim that by pumping iron at a snail’s pace-making each "rep" (repeat) last 14 seconds instead of the usual seven you can safely place extraordinary demands on your muscles, and call forth an extraordinary response. Slow lifting may not be the only exercise you need, as some advocat A. has been misunderstood for decades B. has been widely accepted recently C. has been the basis of weight lifting D. has become the nucleus of aerobics 查看答案 [单项选择] Passage Three Rising Prices Cause House "Apartheid" 涨价导致房屋的“种族隔离” The Government has admitted that soaring house prices have left people on average incomes, such as teachers and nurses, locked out of buying their first homes across large parts of southern England, including London and most of the South East. A spokeswoman for the Deputy Prime Minister, John Prescott, admitted last night that there was now an effective "housing apartheid", with people in their own homes pulling further and further away from those yet to get on the property ladder. With house prices rising at betwe A. Allow them to buy houses at reduced prices. B. Raise the point at which people must pay stamp duty. C. Lower the price of stamp duty. D. 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