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【题目】下列关于地球仪上经度和纬度的叙述,正确的是

A.经度从本初子午线向东、向西度数逐渐增大

B.纬度从本初子午线向东、向西度数逐渐增大

C.所有西经度都位于西半球,所有东经度都位于东半球

D.度数相同的纬度位于同一半球

【答案】A

【解析】

根据在地球仪上,纬线是垂直于地轴并环绕地球一周的圆圈,纬线的长度不一定相等,最长的纬线是赤道,长约4万千米。经线是连接南北两极并与纬线垂直相交的半圆。0°纬线的长度约是0°经线长度的两倍,进行分析解答。

在地球仪上,0°经线又称本初子午线,从本初子午线向东、向西度数逐渐增大,故A正确。纬度从0°纬线向南、向北度数逐渐增大,故B错误。

160°E20°W组成的经线圈是东西半球的分界线,故C错误。

度数相同的纬线位于南北两个半球,故D错误。

故选:A

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