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A 16-year survey on the arctic Norwegian...

A 16-year survey on the arctic Norwegian island of Svalbard found the reindeer(驯鹿)there have declined in weight by an alarming 12 percent. The reduction in average body-mass is being blamed on global warming.

In research presented lately at a meeting of the British Ecological Society in Liverpool, scientists will explain how rising temperatures are making female reindeer difficult to obtain nutrients during important periods of being pregnant.

Snow in Svalbard typically covers the ground for eight months of the year, which, combined with low temperatures, limits grass growth to June and July. But as summer temperatures have increased by around 1.5℃, grasslands have become more productive, allowing female reindeer to gain more weight by the autumn and therefore to conceive(孕育)more calves.

However, warmer winters have brought with them greater rainfall which freezes when is settles on the snow, therefore locking out the reindeer from the life-supporting food below. As a result, female reindeer are becoming starved, causing them to give birth to much lighter young. The average mass of an adult reindeer in 1998, when the survey began, was 55kg, but by 2016 IT had dropped to 48kg.

Professor Steve Albon, an ecologist at the James Hatton Institute in Aberdeen , said that, because the mammals have a relatively high surface-area-to-volume ratio(表面积与体积比), they are no particularly energy efficient.

Reindeer can often access the inadequate food sources beneath the snow by clearing IT away with their antlers(鹿角), but they cannot break through the hard ice. Without access to the food in winter, calves are being born far lighter than they should be. Numbers of reindeer have also increased rapidly in the past 20 years, meaning that those which are born are facing greater competition for food. “The implication(含义)are that there may well be more smaller reindeer in the Arctic in the coming decades, but possibly at the risk of catastrophic die-offs because of increased ice on the ground,”said Professor Albon Despite the gloomy findings, reindeer appear to be suffering less from the impact of climate change than some other arctic species.

1.Which of the following may be the most important reason for the smaller reindeer?

A. Heavy snow.

B. Greater rainfall.

C. Hard ice.

D. Global warming.

2.According to the passage, rising temperatures will not lead to_________.

A. grass growing more rapidly in summer

B. more rainfall in the arctic area in winter

C. female reindeer’s gaining more weight in winter

D. female reindeer’s suffering from hunger in winter

3.What does the underlined word“gloomy”in the last paragraph mean?

A. Exciting.

B. Optimistic.

C. Disappointing.

D. Doubtful.

4.How does the writer develop the passage?

A. By analyzing the research.

B. By classification of reindeer.

C. By comparing opinions of experts.

D. By telling stories of different species.

 

1.D 2.C 3.C 4.A 【解析】全球变暖导致驯鹿体重减轻 1.细节理解题。根据第一段第二句话The reduction in average body-mass is being blamed on global warming.可知原因是全球变暖。 2.细节理解题。根据第三段But as summer temperatures have increased by around 1.5℃, grasslands have become more productive, (A正确)根据第四段However, warmer winters have brought with them greater rainfall which freezes when is settles on the snow, therefore locking out the reindeer from the life-supporting food below.(B正确) As a result, female reindeer are becoming starved, causing them to give birth to much lighter young. (D正确)The average mass of an adult reindeer in 1998, when the survey began, was 55kg, but by 2016 IT had dropped to 48kg.(C错误) 3.词义猜测题。根据Despite the gloomy findings, reindeer appear to be suffering less from the impact of climate change than some other arctic species.可知,gloomy 与suffering less 表达的意义相反,再根据前面的内容可知,尽管这些发现让人失望。 4.文章主要分析了研究结果,所以答案选A。 名师点睛:文章主题和中心思想的阐述往往需要大量细节信息的支持,这些细节对于理解全文内容至关重要,同时也是归纳和概括文章中心思想的基础。命题人往往会要求考生根据不同的要求阅读文章,以获得某些特定的信息,或准确地寻求所需的细节,并对细节进行直接或间接辨认和理解。文章细节的理解可以细化为:(1)一一对应型。答案与题目在表达形式和意义上直接吻合,一一对应,一目了然。属于浅层次的阅读试题,分数比例较少。(2)语言转述型。这是一类间接事实细节题,答案与题目在意义上从分运用了词义之间的转述关系,即正确选项是原文有关词语和句子的另类表达。属于中档难度题,分数比例较大。(3)语意理解型。这是一类深层事实细节理解题,答案与题目之间存在着一定的逻辑联系,这种联系需要建立在事实的基础上通过上、下文来进行判断、分析、归纳和整合,才能得出正确答案。属于较高难度的事实细节题。(4)是非辨别型。这是一类综合事实细节题,出题形式常常是“三正一误”(三项正确,只有一项不符合原文内容)或“三误一正”(三项错误,只有一项符合原文内容)。(5)事实排序型。这是一类运用多项事实进行排序的事实细节题,要求根据动作发生的先后顺序、时间顺序或者句子之间的逻辑关系,找出时间发生,发展的正确顺序。 此题的第二小题According to the passage, rising temperatures will not lead to______.属于(4)是非辨别型。这是一类综合事实细节题,出题形式常常是“三正一误”(三项正确,只有一项不符合原文内容)或“三误一正”(三项错误,只有一项符合原文内容)。再根据原文的信息注意判断:根据第三段But as summer temperatures have increased by around 1.5℃, grasslands have become more productive, (A正确)根据第四段However, warmer winters have brought with them greater rainfall which freezes when is settles on the snow, therefore locking out the reindeer from the life-supporting food below.(B正确) As a result, female reindeer are becoming starved, causing them to give birth to much lighter young. (D正确)The average mass of an adult reindeer in 1998, when the survey began, was 55kg, but by 2016 IT had dropped to 48kg.(C错误)
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