2. 外语
  3. ______is often called the "backbone of North America", extending from the Northwest to the Southeast of American land.

______is often called the "backbone of North America", extending from the Northwest to the Southeast of American land.

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问题 ______is often called the "backbone of North America", extending from the Northwest to the Southeast of American land.
选项 A、The Appalachian Mountains
B、The Rocky Mountains
C、The Cordillera Range
D、The Cascade Range
答案B
解析 The Rocky Mountains(落基山脉)和The Appalachian Mountains(阿巴拉契亚山)两大山脉是美国地理知识中的重点。The Appalachian Mountains通常也被称作the Green Mountains，the White Mounmins，the Catskills，the Blue Ridge Mountains，theCarolinas 和the Great Smokies，它从美国的北阿拉巴马州延伸到加拿大的魁北克省，全长达1200英里，占美国大陆国土面积的1／6。The Rocky Mountains从美国的新墨西哥州延伸到加拿大的魁北克省，总长5000公里，平均海拔达3000米以上，因此也被称作“the great backbone of North America”或者“the Continental Divide”。
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