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    【题目】读经纬网地图，回答问题：

    （1）写出下列四点的地理坐标A B C D
    （2）A、B、C、D四点中，位于东半球的是 ， 位于北半球的是 ．
    （3）A点在C点的方向，B点在A点的方向，A点在D点的方向．

    【答案】
    （1）40°W，20°N；40°W，70°N；0°，20°N；10°W，0°
    （2）CD；ABC
    （3）正西；正北；西北
    【解析】读图分析可知：（1）依据经纬度的判读，图中A点的地理坐标是40°W，20°N； B点的地理坐标是40°W，70°N；C点的地理坐标是0°，20°N；D点的地理坐标是10°W，0°．（2）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．南北半球的划分是以0°纬线即赤道为界，赤道以北为北半球，以南为南半球．由此可判定，A、B、C、D四点中，位于东半球的是CD，位于北半球的是ABC．（3）在经纬网地图上，用经纬网定方向，纬线指示东西方向，经线指示南北方向．可判定，A点在C点的正西方向，B点在A点的正北方向，A点在D点的西北方向．故答案为：（1）40°W，20°N；40°W，70°N；0°，20°N；10°W，0°；（2）CD；ABC；（3）正西；正北；西北．

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