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People eslewhere agree on what a mountain is—or do __1__they? The fact is that definitions vary. Everyone admits for example, that Everest is a mountain, the lowest of __2__them all, an altitude of almost 30,000 feet. But what about__3__Snowdon, the loftiest peak in Wales? It raises a mere 3000__4__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 Green Mountains seem something more__5__than hills. Geographers generally agree that, to be a mountain topographically, a landmass might reach an altitude of 3000__6__feet above the level of the sea. Mount Everest, for instance, is 30,000 feet above sea level, but not only 15,000 feet above the__7__neighboring Tibetan plateau. Geologists restrict the definition
even more, maintaining that a mountain is a mountain with__8__virtue of its geological structure. Some rugged highlands are not really mountains, when some flat, low-lying rock surfaces__9__are ture 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 ture mountains,they are originally formed by large-scale movements of the__10__earth's crust.
答案：1. elsewhere—everywhere
elsewhere意爲“別處”
2. lowest—highest
3. an前加with
with在此處表示“具有......”相當於having
4. raise—rises
raise爲及物動詞，其後常帶賓語;rise爲不及物動詞a mere 3000 feet在此處不是raise的賓語，而是狀語
5. something—nothing
nothing此處爲副詞，修飾more。本句意義爲“對生活在北美大平原地區的一般人而言，謂語Vermont州的Green Mountains看上去真的很高了，但對於任何一個來自Rocky Mountain地區的人而言，Green Mountain看上去不過是個山丘而已”。
6. might—must
作爲一種標準必須達到某個高度
7. 刪除only之前的not
否則文理不通
8. with—in或by
by/in virtue of：與“by reason of，because of ”同意
9. when—while
此處while與whereas同意，表示對照比較
10. are—were
originally formed 該動作是很早以前完成或結束的
