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 本文主要是講述了冰山如果墜落與企鵝的棲息地,這個(gè)地方企鵝的數(shù)量就會(huì)慢慢下降,因?yàn)槠簌Z已經(jīng)不能再在這個(gè)墜落了冰山的地方覓食,更不要提繁衍后代.
解答 24.B 推理判斷題.根據(jù)第二段The iceberg's grounding meant the penguins had to walk more than 60kilometers to find food,preventing their breeding attempts,可知企鵝得花更多的時(shí)間去覓食,因而沒有時(shí)間去繁衍后代,故選B.
25.A 推理判斷題.由倒數(shù)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.可知企鵝的生存很艱難,故選A.
26.C 詞義猜測題.由最后一段段意可知,作者是把兩個(gè)不同地方的企鵝進(jìn)行對(duì)比,文章前幾段講這個(gè)地方的企鵝生活不好,因此東部的企鵝生活是好的,充滿活力,故選C.
27.B 主旨大意題.本文主要講述了冰山給企鵝帶來的負(fù)面作用,故選B.
點(diǎn)評(píng) 本篇文章難點(diǎn)在推理判斷題上.推理判斷題要以表面文字為前提,以具體事實(shí)為依據(jù)進(jìn)行推理,做出判斷.這種推理方式比較直接,考生只要弄清事實(shí),即可結(jié)合上下文推斷出合理的結(jié)論.