右图中O点为北极点,EF是昏线,OG是某一日期界线,∠HOG=45°,回答

右图中O点为北极点,EF是昏线,OG是某一日期界线,∠HOG=45°,回答1~2题。

1.图中另一条日期界线是 (  )

A.135°W                          B.135°E

C.45°W                           D.45°E

2.此时完全处于夜半球的大洲是 (  )

A.非洲B.大洋洲C.南美洲D.欧洲

 

答案

D A

 

根据题意可知,OF所在经线为0时经线,则OG所在经线为180°经线,由经度的变化可推知OF的经度为45°E。

由图知,经度范围大致从45°W→0°→135°E,且位于中低纬度的地区为夜半球,联系各大洲的经纬度位置可确定答案为A。

 

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