In America, the high, sharp and rugged Rocky Mountains to the east of the Pacific Ocean are called ________.
本题考查落基山脉的相关知识。 落基山脉又译作洛矶山脉, 是美洲科迪勒拉山系在北美的主干, 由许多小山脉组成, 被称为北美洲的“脊骨”。