Growing numbers of scientists therefore see Antarctica as a distant-early-warning sensor, where potentially dangerous global trends may be spotted before they show up to the north. One promising field of investigation is glaciology. Scholars from the United States, Switzerland, and France are pursuing seven separate but related projects that reflect their concern for the health of the West Antarctic Ice Sheet a concern they believe the world at large should share.

　　The Transantarctic Mountain, some of them more than 14,000 feet high, divide the continent into two very different regions. The part of the continent to the "east" of the mountains is a high plateau covered by an ice sheet nearly two miles thick. "West" of the mountain, the half of the continent south of the Americas is also covered by an ice sheet, but there the ice rests on rock that is mostly well below sea level. If the West Antarctic Ice Sheet disappeared, the western part of the continent would be reduced to a sparse cluster of island.

　　While ice and snow are obviously central to many environmental experiments, others focus on the mysterious "dry valley"of Antarctica, valleys that contain little ice or snow even in the depths of winter. Slashed through the mountains of southern Victoria Land, these valleys once held enormous glaciers that descended 9,000 feet from the polar plateau to the Ross Sea. Now the glaciers are gone, perhaps a casualty of the global warming trend during the 10,000 years since the ice age. Even the snow that falls in the dry valleys is blasted out by vicious winds that roars down from the polar plateau to the sea. Left bare are spectacular gorges, rippled fields of sand dunes, clusters of boulders sculptured into fantastic shapes by 100-mile-an-hour winds, and an aura of extraterrestrial desolation.

　　Despite the unearthly aspect of the dry valleys, some scientists believe they may carry a message of hope of the verdant parts of the earth. Some scientists believe that in some cases the dry valleys may soak up pollutants faster than pollutants enter them.

　　1. What is the best title for this passage?

　　[A] Antarctica and environmental Problems.

　　[B] Antarctica: Earth"s Early-Warning station.

　　[C] Antarctica: a Unique Observation Post.

　　[D] Antarctica: a Mysterious Place.

　　2. What would the result be if the West Antarctic Ice Sheet disappeared?

　　[A] The western part of the continent would be disappeared.

　　[B] The western part of the continent would be reduced.

　　[C] The western part of the continent would become scattered Islands.

　　[D] The western part of the continent would be reduced to a cluster of Islands.

　　3. Why are the Dry Valleys left bare?

　　[A] Vicious wind blasts the snow away.

　　[B] It rarely snows.

　　[C] Because of the global warming trend and fierce wind.

　　[D] Sand dunes.

　　4. Which of the following is true?

　　[A] The "Dry Valleys" have nothing left inside.

　　[B] The "Dry Valleys" never held glaciers.

　　[C] The "Dry Valleys" may carry a message of hope for the verdant.

　　[D] The " Dry Valleys" are useless to scientists.

　　Vocabulary

　　1. distant-early-warning sensor 远距离早期报警传感器

　　2. plateau 高原，高地

　　3. slash 挥砍

　　4. blast 一阵疾风/狂风

　　5. vicious 邪恶的，凶魔般的

　　6. gorge 峡谷

　　7. ripple 起伏，使起微波

　　8. sand dune 沙丘

　　9. verdant 绿色

　　10. extraterrestrial 地球之外的

　　11. aura 气氛

　　难句译注

　　1. Growing numbers of scientists therefore see Antarctica as a distant-early waning sensor, where potentially dangerous global trends may be spotted before they show up to the north.

　　【结构简析】see … as 把……看作。Where定从修饰Antarctic。

　　【参考译文】因此，越来越多的科学家把南极洲视为一个远距离早期报警敏感器，在那里地球许多潜在的危险动向早在它们出现于北方以前就能发现。

　　2. The part of the continent to the "east" of the mountain

　　东指的使印度正南的这一部分。或山移动的那部分洲。

　　3. an aura of extraterrestrial desolation

　　应译为：与地球格格不入的一种荒凉隔绝的气氛。或与世隔绝的一种荒凉气氛。

　　以上就是这篇文章《2016年12月英语四级阅读：南极洲科研考察》的详细内容。

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