【題目】零度經(jīng)線叫___________,零度緯線叫____________

【答案】本初子午線 赤道

【解析】

人們?yōu)榱吮阌趨^(qū)分各條緯線和經(jīng)線,都給他們標(biāo)注了不同的度數(shù)。赤道(0°緯線)是地球上最長的緯線圈,它是劃分南北半球的分界線;赤道以南稱南緯(S表示),以北稱北緯(N表示),各有90°;緯線指示東西方向;國際上將通過英國格林尼治天文臺舊址的經(jīng)線作為經(jīng)度的起點線(即0°經(jīng)線--又叫本初子午線),以這條線向東為東經(jīng)(E表示),以西為西經(jīng)(W表示),各有180°;經(jīng)線指示南北方向。赤道是劃分南北半球的分界線;20°W160°E組成的經(jīng)線圈是劃分東西半球的分界線。

經(jīng)線又叫子午線,0°經(jīng)線又叫本初子午線,該線以東是東經(jīng),以西是西經(jīng),0°緯線叫赤道,以南是南緯,以北是北緯。

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