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【题目】你切过西瓜吗?通过西瓜的两端,将西瓜切成两半有多少种切法?切法实在是太多了。同样的道理,通过两极将地球分成东西半球的方法也很多,于是人们规定:( )

A. 本初子午线和180°经线将地球划分为东西半球

B. 20°E和160°W为东西半球分界线

C. 20°W和160°E为东西半球分界线

D. 从20°W开始往西至160°E为东半球,另一半为西半球

【答案】C

【解析】

根据经线连接南北两极,任何一个经线圈都能把地球分成相等的两份;人们把20°W160°E经线作为东西半球的分界线,进行分析解答。

人们把20°W160°E为东西半球分界线,从20°W开始往西至160°E为西半球,另一半为东半球;0°经线和180°经线是东西经度的分界线。故选:C

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