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  3. Do people everywhere agree on what a mountain is? The fact is that definitions vary. Everyone admits, for example, that Everest

Do people everywhere agree on what a mountain is? The fact is that definitions vary. Everyone admits, for example, that Everest

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问题     Do people everywhere agree on what a mountain is? The fact is that definitions vary. Everyone admits, for example, that Everest is, a mountain, the highest of them all, with an altitude of almost 30 000 feet. But what about Snowdon, the loftiest peak in Wales? It rises a mere 3 000 feet, yet it is also called a mountain. Comparison, a little matter of relativity, is the key. To the average person living on North America’s Great Plains, Vermont’s Green Mountains look lofty indeed, but to anyone from the Rocky Mountains, the Great Mountains seem nothing more than hills.
    Geographers generally agree that, to be a mountain topographically(地形学方面), a landmass must reach, an altitude of 3 000 feet above the level of the sea. Mount Everest, for instance, is 30 000 feet above sea level, but only 15 000 feet above the neighboring Tibetan plateau. Geologists restrict the definition even more, maintaining that a mountain is a mountain by virtue of its geological structure. Some rugged highlands are not really mountains, while some flat, low-lying rock surfaces are true mountains. They are low now because of centuries of erosion. There are even mountains under the sea, the Mid-Atlantic Ridge, for example. Like all true mountains, they were originally formed by large-scale movements of the earth’s crust.
Everest is the highest mountain in______.
选项 A、the world
B、North America
C、Tibet
D、both A and B
答案A
解析
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