The southwest of Australia has been named as one of 25”hot spots” for future species extinction(滅絕)because of global warming.A new study says global warming will become a top cause of extinction across the world,with thousands of species of plantsand animals likely to be wiped out in the coming decades.
According to the study,global warming ranks among the most serious threats to the planet’s biodiversity and,under some conditions,may be more than that due to deforestation.This study provides even stronger scientific evidence that global warming will result in catastrophic(災難性的)species losses across the planet.Last month,a UN study said humans were responsible for the worst extinction and urged extra efforts to reach a UN target of slowing the rate of losses by 2010.
Scientists disagree about how far global warming is to blame compared with other human threats such as deforestation,pollution and the introduction of some species to new habitats.But the new study looks at the 25 “hot spots”—?areas? that contain a big concentration of plants and animals—and predicts that 11.6 percent of all species,with a range from 1 to 43 percent,could be driven to extinction if levels of heat trapping gases in the atmosphere were to keep rising in the next 100 years.
The range would mean the loss of thousands of species.The study gave a wide range because of uncertainties, for instance, about the ability of animals or plants to move towards the poles if the climate warmed. Rare plants,tortoises or birds found only on the southern tip of Africa cannot move south because the nearest land is thousands of miles away in Antarctica.
小題1:According to the passage,which of the following about Australia is TRUE?
A．Australia possesses the richest species in the world.
B．Australia is the country with the highest rate of extinction.
C．The species in the southwest of Australia will be easily affected by global warming.
D．Australia will have the highest temperature in the world.
小題2:According to the passage,all the 25”hot spots”-------- .
A．a(chǎn)re rich in plants and animals
B．a(chǎn)re lacking in natural resources
C．lost most of their plants in 2010
D．will be much hotter than the rest of the world
小題3:We can infer if the climate warms,the animals in Australia will most probably move to the ______ .
A．northB．eastC．westD．south
小題4:What would be the best title for the passage?
A．Australia Named as Extinction”Hot Spot”
B．Global Warming and Species Extinction
C．Global Warming is Number One Killer
D．Australia on the Edge of Extinction

小題1:C
小題2:A
小題3:D
小題4:B

試題分析：文章講述了澳大利亞的25個熱點地區(qū)和因為全球氣溫變暖和物種滅絕的問題。
小題1:細節(jié)題：從第一段的句子：The southwest of Australia has been named as one of 25”hot spots” for future species extinction(滅絕)because of global warming.可知因為氣溫變暖澳大利亞的西南部的植物動物有可能滅絕。選C
小題2:推理題：從第二段的句子：But the new study looks at the 25 “hot spots”—?areas? that contain a big concentration of plants and animals可知25個熱點地區(qū)富含植物和動物。選A
小題3:推理題：從最后一段的句子：Rare plants,tortoises or birds found only on the southern tip of Africa cannot move south because the nearest land is thousands of miles away in Antarctica. 可知如果氣候變暖，澳大利亞的動物會向南遷移。選D。
小題4:主旨題：文章講述了澳大利亞的25個熱點地區(qū)和因為全球氣溫變暖和物種滅絕的問題。選B
點評：文章難度適中，題目集中考查推理題，如1，2題，要求考生根據(jù)題目要求，在文章中準確定位。進行推理。
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A．the newcomers usually miss the days living at home
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B．To help make friends with other freshers．
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Mars Was Not Always Bitterly Cold
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C．to discover or prove
D．to start having a relationship with others
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B．By using spacecraft orbiting Mars.
C．By studying minerals gathered on Mars
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C．From the name of the scientist who found it.
D．From the name of the aircraft that discovered it
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A．In a biography of scientists.
B．In a geography magazine.
C．In an environment report.
D．In a science report.

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