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2017年6月英语四级阅读理解100篇精析（10）
英语四级阅读理解分值占整个考试的35%，比重很大。英语四级备考中后期建议考生们每天进行英语四级阅读模拟练习，严格把控做题时间，下面是新东方网考研频道英语四级频道为大家整理的2017年6月英语四级阅读理解100篇精析。
Antarctica has actually become a kind of space station a unique observation
post for detecting important changes in the world's environment. Remote from
major sources of pollution and the complex geological and ecological systems
that prevail elsewhere, Antarctica makes possible scientific measurements that
are often sharper and easier to interpret than those made in other parts of the
world.
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 ofsand 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.
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发表于 2017-5-2 18:01:35