[题目]东西半球的分界线是( )A.0°经线和180°经线B.20°E.160°WC.20°W.160°ED.赤道题目和参考答案——青夏教育精英家教网—

题目内容

【题目】东西半球的分界线是（）

A.0°经线和180°经线B.20°E，160°WC.20°W，160°ED.赤道

【答案】C

【解析】

根据任何两条相对的经线（经度之和为180°），都组成一个经线圈；任何一个经线圈，都把地球分成相等的两个半球．东经180°和西经180°，实际上重合为一条经线，即180°经线．国际上习惯用20°W和160°E这两条经线组成的经线圈，作为划分东西半球的界线，因为这个经线圈基本上是从海洋通过，避免了以0°和180°经线划界，将欧洲和非洲的一些国家分隔在两个半球上，进行分析解答。

东西半球分界线是20°W和160°E组成的经线圈，20°W以东、160°E以西为东半球，20°W以西、160°E以东为西半球。赤道是南北半球的分界线。依据题意。故选：C。

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