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The world’s greatest snow-capped peaks, which run in a chain from the Himalayas to the Tianshan Mountains on the border of China

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问题    The world’s greatest snow-capped peaks, which run in a chain from the Himalayas to the Tianshan Mountains on the border of China and Kyrgyzstan, have lost no ice over the last decade, new research shows.
   The discovery has【C1】______ scientists, who had believed that around 50 billion tons of melted water were being shed each year and not being replaced by new snowfall.
   The study is the first to survey all the world’s icecaps and glaciers and was made 【C2】______ by the use of satellite data. Overall, the【C3】______ of melting ice outside the two largest caps — Greenland and Antarctica — is much【C4】______ than previously estimated, with the lack of【C5】______ loss in the Himalayas and the other high【C6】______ of Asia responsible for most of the discrepancy.
   Bristol University glaciologist Professor Jonathan Bamber said, "The very unexpected result was the【C7】______ mass loss from high mountains of Asia, which is not【C8】______ different from zero."
   The melting of Himalayan glaciers caused【C9】______ in 2009 when a report from the UN’s Intergovernmental Panel on Climate Change mistakenly stated that they would disappear by 2035, instead of 2350.【C10】______, the scientist who led the new work is clear that while greater uncertainty has been discovered in Asia’s highest mountains, the melting of icecaps and glaciers around the world【C11】______ a serious concern.
   "Our results and those of everyone else show we are【C12】______ a huge amount of water into the oceans every year," said Professor John Wahr of the University of Colorado. His team’s study concludes【C13】______ 443 to 629 billion tons of melted water overall are added to the world’s oceans each year. This is【C14】______ sea level by about 1.5 mm a year, the【C15】______ reports, in addition to the 2 mm a year caused by【C16】______ of the warming ocean.
   The scientists are【C17】______to point out that lower-altitude glaciers in the Asian mountain ranges are【C18】______ melting. Satellite images and reports【C19】______ this. But over the study period from 2003 to 2010, enough ice was added to the peaks to 【C20】______.
【C16】
选项 A、expansion
B、contraction
C、inflation
D、augmentation
答案A
解析 本题考查语境推理。前半句中的this指代上一句的“雪山融水流入大海”，这使得“每年海平面抬升大概1．5毫米”；除此之外，海平面上升也与海水变暖有关，由此可推断本句意为“海洋变暖范围的扩大使得海平面又上升了2毫米”。词义辨析：expansion n．意为“范围的扩大，扩张”；contraction n．意为“收缩，缩小”；innation n．意为“膨胀，夸张，充气”；augmentation n．意为“(数量或体积)增大，提高，加强”。根据词义，选择expansion最为恰当。
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