【題目】習(xí)慣上劃分東西半球的分界線是( )

A. 20°E，160°W B. 20°W，160°E

C. 0°經(jīng)線和0°緯線 D. 0°經(jīng)線和180°經(jīng)線

【答案】B

【解析】試題分析：

我們以赤道，即0°緯線為界將地球劃分為南北半球，赤道以北為北半球，以南為南半球；以20°W和160°E組成的經(jīng)線圈為界將地球劃分為東西半球，20°W以東、160°E以西為東半球，20°W以西、160°E以東為西半球；0°經(jīng)線，即本初子午線是東西經(jīng)度的分界線；180°大致和日界線重合，是日期分界線，故本題選B。

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