18.A new report says sea ice in the Arctic Ocean is melting more quickly than expected.American scientists say the ice is melting even faster than computer programs had estimated.
Scientists know that climate change has a major effect on the Arctic Ocean partly because sea ice is disappearing.They also know that areas of open seawater are expanding.Such areas are known to take in sunlight and increase temperatures.Scientists say this has helped to cause the loss of the Arctic's ice cover.
For the study,the American scientists compared eighteen computer programs with observations made by satellites and other instruments.The Intergovernmental Panel on Climate Change used the computer programs to prepare its 2007estimates of climate change.
The computer programs gave estimates of the amount of ice in the Arctic Ocean in the month of September.September is when the Arctic has the least ice,after the warm,summer months.The computer estimates suggested an ice loss of two and a half percent for every ten-year period between 1953and 2006.
Newer studies of the Arctic have used information gathered by aircraft,satellites and ships.This information showed a loss of September ice cover of almost eight percent for every ten-year period between 1953and last year.This means the ice is disappearing about thirty years faster than the computer programs estimated.
The scientists say the programs might not have recognized the full effect of increased carbon dioxide and other gases in Earth's atmosphere.They say their study suggests the gases may have more of an effect than had been thought.
66.It is reported that sea ice in the Arctic Ocean is melting more quickly than expected mainly becauseB.
A.sea ice's disappearance B.climate change
C.seawater's expansion D.the loss of the Arctic's ice cover
67.How did the scientists draw the conclusion that sea ice in the Arctic Ocean is melting more quickly than expected?A
A.The scientists have compared the computer programs with observation made by satellites and other instruments.
B.The scientists have found that the seawater take in sunlight and increase temperatures
C.The scientists have figured out many numbers with the help of computer.
D.The scientists have been observing the Arctic Ocean for many years.
68.If the ice melts at the present speed,by the end of this century the ice loss in the Arctic Ocean will beD according to newer studies.
A.22.5% B.35% C.72% D.100%
69.Which of the following is TRUE according to the passage?C
A.The figures of the computer estimates are wrong.
B.Scientists study climate change through studying sea level.
C.Newer studies show gases may have more effect on sea ice in the Arctic Ocean.
D.The ice is melting even faster than satellites have estimated.
70.This report mainly warns human toC.
A.prevent the sea ice in the Arctic Ocean from melting any more
B.pay more attention to the loss of the Arctic's ice cover
C.take necessary steps to protect the environment of our earth
D.stop summer sea ice in the Arctic from disappearing so fast.
分析 文章介紹了北冰洋的浮冰正在加速融化,主要受氣候變化和氣體的影響.本文屬于環(huán)保類文章,作者旨在呼吁人們保護(hù)環(huán)境.
解答 66---70 BADCC
66.答案B.細(xì)節(jié)理解題.根據(jù)第二段Scientists know that climate change has a major effect on the Arctic Ocean partly because sea ice is disappearing可知,冰川融化主要是受氣候變化的影響.故選B.
67.答案A.細(xì)節(jié)理解題.根據(jù)第三段the American scientists compared eighteen computer programs with observations made by satellites and other instruments可知,科學(xué)家通過比較衛(wèi)星或其他工具收集的電腦數(shù)據(jù)得出的結(jié)論.故選A.
68.答案D.?dāng)?shù)字計(jì)算題.根據(jù)第四段This information showed a loss of September ice cover of almost eight percent for every ten-year period between 1953and last year可知,最新的研究表明,自1953年開始,每10年有8%的冰川在消失,故完全消失的話大約要用130年,約在2038年完全消失.故本世紀(jì)末,冰川已完全消失.答案選D.
69.答案C.細(xì)節(jié)理解題.根據(jù)最后一段They say their study suggests the gases may have more of an effect than had been thought可知,氣體對(duì)冰川的影響比我們想象中要大得多.故選C.
70.答案C.主旨大意題.根據(jù)全文可知,文章介紹了北冰洋的浮冰正在加速融化,主要受氣候變化和氣體的影響.本文屬于環(huán)保類文章,作者旨在呼吁人們保護(hù)環(huán)境.故選C.
點(diǎn)評(píng) 報(bào)道類文章一般由標(biāo)題(Head line),導(dǎo)語(yǔ)(Introduction),背景(Back ground),主體(Main body)和結(jié)尾(End)五部分構(gòu)成.標(biāo)題是文章中心思想高度而又精辟的概括,但根據(jù)歷年的高考情況來看,這類閱讀理解材料一般不給標(biāo)題,而要同學(xué)們選擇標(biāo)題.導(dǎo)語(yǔ)一般位于整篇文章的首段.背景交待一個(gè)事實(shí)的起因.主體則對(duì)導(dǎo)語(yǔ)概括的事實(shí)進(jìn)行詳細(xì)敘述,這一部分命題往往最多,因此,閱讀時(shí),同學(xué)們要把這部分作為重點(diǎn).結(jié)尾往往也是中心思想的概括,并與導(dǎo)語(yǔ)相呼應(yīng),命題者常在此要設(shè)計(jì)一道推理判斷題.在進(jìn)行推理判斷時(shí),同學(xué)們一定要以閱讀材料所提供的科學(xué)事實(shí)為依據(jù),同時(shí)所得出的結(jié)論還應(yīng)符合基本的科普常識(shí).