【題目】讀經(jīng)緯網(wǎng)地圖，回答問題：

（1）寫出下列四點(diǎn)的地理坐標(biāo)A B C D
（2）A、B、C、D四點(diǎn)中，位于東半球的是 ， 位于北半球的是 ．
（3）A點(diǎn)在C點(diǎn)的方向，B點(diǎn)在A點(diǎn)的方向，A點(diǎn)在D點(diǎn)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】讀圖分析可知：（1）依據(jù)經(jīng)緯度的判讀，圖中A點(diǎn)的地理坐標(biāo)是40°W，20°N； B點(diǎn)的地理坐標(biāo)是40°W，70°N；C點(diǎn)的地理坐標(biāo)是0°，20°N；D點(diǎn)的地理坐標(biāo)是10°W，0°．（2）東西半球分界線是20°W和160°E組成的經(jīng)線圈，20°W以東、160°E以西為東半球，20°W以西、160°E以東為西半球．南北半球的劃分是以0°緯線即赤道為界，赤道以北為北半球，以南為南半球．由此可判定，A、B、C、D四點(diǎn)中，位于東半球的是CD，位于北半球的是ABC．（3）在經(jīng)緯網(wǎng)地圖上，用經(jīng)緯網(wǎng)定方向，緯線指示東西方向，經(jīng)線指示南北方向．可判定，A點(diǎn)在C點(diǎn)的正西方向，B點(diǎn)在A點(diǎn)的正北方向，A點(diǎn)在D點(diǎn)的西北方向．故答案為：（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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