單項選擇題我國1:5萬的地形圖的經(jīng)差與緯差為:()

A.經(jīng)差15′、緯差10′
B.經(jīng)差1°30′、緯差1°
C.經(jīng)差7.5′、緯差5′
D.經(jīng)差3′45″、緯差2.5′


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