习惯上，划分南美洲与北美洲的界线是（） A．中

习惯上，划分南美洲与北美洲的界线是（）

A．中美地峡 B．巴拿马运河 C．白令海峡 D．麦哲伦海峡

答案

B．

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习惯上，划分南美洲与北美洲的界线是（） A．中