2004年MBA考前冲刺-英语模拟试题及答案(2-5)
网络资源 免费考研网/2009-01-16
Questions 55 to 58 are based on the following passage:
Forests will be less effective at slowing climate change
than scientists thought, because they’ll absorb less
carbon dioxide(二氧化碳) than expected. That verdict
follows a four-year experiment to see how much CO2 trees
will absorb from the atmosphere when pollution has raised
levels of the gas.
The results should hammer home the message that world can’
t rely on trees to solve the problems of CO2 emission,
according to William Schlesinger at Duke University, whose
team carried out the work. “ It throws doubt on nations
such as the US who have carbon sequestration(隔离) their
only strategy for dealing with the problem,” he says.
Global CO2 emission from sources such as car exhausts and
industry are predicted to double between now and 2050. More
CO2 means that trees will grow faster and lock up more
carbon. This led some to hope that plants might absorb all
the extra gas. But earlier experiments to find out how much
CO2 plants can absorb have been inconclusive because they
took place in sealed environments such as greenhouses.
These can’t maintain realistic outdoor climate conditions
of temperature humidity and rain.
To find out more, Schlesinger and his colleagues have
monitored growth of mature trees in Duke Forest. They
staked out six plots of trees with rings of 32 vertical
pipes. Each plot is 30 meters in diameter. At tree sites,
the pipes pump out air enriched with CO2 to mimic(模仿)
conditions predicted for 2050; at the other three sites,
they pump out normal turn-of-the century air. The system
monitors CO2 levels within the ring and adjusts delivery to
maintain the right mix.
The team found that the trees in the 2050 atmosphere
converted more carbon dioxide into plant matter, locking up
27 percent more carbon than at control sites. However, even
if this extra growth occurs in existing temperate forests
all over the world in 2050, the trees will only absorb 10
percent of human-generated CO2. “They will soak up carbon,
but the study contradicts those who say they will soak up
large amount,”Says schlesinger. ‘ the effect is not as
large as people had expected,” agrees Peter Cox at
Britain’s Meteorological(气象的)Office in Bracknell.
He says Schlesinger’s results warn us that forests cannot
solve the problem of global warming, and emissions need to
be reduced. “Eventually you have to deal with the root
cause,” he says.
55. The recent research indicates that____
A. The emission of carbon dioxide increases quickly.
B. The forest has no effect on holding back global
warming.
C. It isn’t sensible to solve the warming effect by
the forest.
D. The conclusion mentioned was deduced in theory.
56. According to the experiment, which of the following is
true?
A. The trees in different plots absorb the same
amount of carbon dioxide approximately.
B. The trees in the 2050 atmosphere absorb more
carbon dioxide than those in our century air.
C. The trees in the 2050 atmosphere absorb less
carbon dioxide than those in our century air.
D. The trees in the 2050 atmosphere absorb large
amount of carbon dioxide.
57. From the last paragraph, we can learn that_____
A. The researchers were excited to find the forest
can take in more carbon dioxide in 50 years.
B. The carbon dioxide absorbed by the forest will
reduce in 50 years.
C. Compared with the carbon dioxide discharged, the
part absorbed is negligible
D. The increasing carbon dioxide has been out of
control.
58. The best title for the passage is _____
A. The warming is out control
B. Facing global warming, don’t count on the forests.
C. Stop the emission of carbon dioxide.
D. The forests can absorb little carbon dioxide.
参考答案:
55. C 56. B 57. C 58. B
摘自《英语--临考点拨与模拟考场》
策划:太奇MBA培训中心
主编:周建武
出版社:中国经济出版社
(待续)