题目内容
13.Most penguins died after a huge iceberg grounded near their habitat in Antarctica,forcing them to make a long way to find food,scientists say in a newly published study.The B09B iceberg,measuring about 100square kilometers,grounded in Commonwealth Bay in East Antarctica in December 2010,the researchers from Australia and New Zealand wrote in the"Antarctic Science"journal.The Adelie penguin population at the bay's Cape Denison was measured to be about 160,000in February 2011but by December 2013it had decreased to about 10,000,they said.The iceberg's grounding meant the penguins had to walk more than 60kilometers to find food,preventing their breeding attempts,said the researchers from the University of New South Wales'( UNSW) Climate Change Research Centre and New Zealand's West Penguin Trust.
"The Cape Denison population could disappear completely within 20years unless B09B relocates or the fast ice within the bay breaks out,"they wrote in the research published in.Fast ice is sea ice which forms and stays along the coast.During their survey in December 2013,the researchers said"hundreds of abandoned eggs were noted,and the freeze-dried dead bodies of previous season's little penguins lay everywhere on the ground."
"It's strangely silent,"UNSW's Chris Turney,who led the 2013exploration,told the"Sydney Morning Herald Friday"."The ones that we saw at Cape Denison were terribly low-spirited,almost unaware of your existence.The ones that are surviving are clearly struggling.They can hardly survive themselves,let alone give birth to the next generation.We saw lots of dead birds on the ground."
In contrast,penguins living on the eastern edge of the bay just 8kilometers from the fast ice edge were full of vigour,the scientists said.The researchers said the study had important influence on the wider East Antarctic if the current situation of increasing sea ice continued.Sea ice around Antarctica is increasing,in contrast to the Arctic where global warming is causing ice to melt and icebergs to decrease.Scientists believe the growth in Antarctic sea ice is likely to be driven by changes in wind and local conditions before long.
24.What's the main reason why the Adelie penguin population decreased?B
A.Many Adelie penguins died from the cold weather in Antanctic.
B.They didn't have enough time to give birth to and raise babies.
C.The iceberg's grounding killed a number of Adelie penguins.
D.Adelie penguins lost their habitats so they couldn't breed.
25.Which statement is correct according to the passage?A
A.The life of penguins in Cape Denison was very hard.
B.Penguins in Cape Denison were afraid of humans.
C.The sea ice in Antarctica is decreasing faster than before.
D.Human activities caused much damage to Cape Denison.
26.What does the underlined word"vigour"in the last paragraph mean?C
A.Trouble.B.Food.C.Energy.D.Joy.
27.What's the main idea of the passage?B
A.Global warming caused penguins'death.
B.Iceberg harmed penguins'life.
C.Penguins need more habitats.
D.Antarctic extreme weather caused penguins'death.
分析 本文主要是讲述了冰山如果坠落与企鹅的栖息地,这个地方企鹅的数量就会慢慢下降,因为企鹅已经不能再在这个坠落了冰山的地方觅食,更不要提繁衍后代.
解答 24.B 推理判断题.根据第二段The iceberg's grounding meant the penguins had to walk more than 60kilometers to find food,preventing their breeding attempts,可知企鹅得花更多的时间去觅食,因而没有时间去繁衍后代,故选B.
25.A 推理判断题.由倒数第二段The ones that we saw at Cape Denison were terribly low-spirited,almost unaware of your existence.The ones that are surviving are clearly struggling.They can hardly survive themselves,let alone give birth to the next generation.可知企鹅的生存很艰难,故选A.
26.C 词义猜测题.由最后一段段意可知,作者是把两个不同地方的企鹅进行对比,文章前几段讲这个地方的企鹅生活不好,因此东部的企鹅生活是好的,充满活力,故选C.
27.B 主旨大意题.本文主要讲述了冰山给企鹅带来的负面作用,故选B.
点评 本篇文章难点在推理判断题上.推理判断题要以表面文字为前提,以具体事实为依据进行推理,做出判断.这种推理方式比较直接,考生只要弄清事实,即可结合上下文推断出合理的结论.
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