题目内容

【题目】习惯上划分东西半球的分界线是( )

A. 20°E，160°W B. 20°W，160°E

C. 0°经线和0°纬线 D. 0°经线和180°经线

【答案】B

【解析】试题分析：

我们以赤道，即0°纬线为界将地球划分为南北半球，赤道以北为北半球，以南为南半球；以20°W和160°E组成的经线圈为界将地球划分为东西半球，20°W以东、160°E以西为东半球，20°W以西、160°E以东为西半球；0°经线，即本初子午线是东西经度的分界线；180°大致和日界线重合，是日期分界线，故本题选B。

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