單項(xiàng)選擇題
A.E經(jīng)差、N緯差B.E經(jīng)差、S緯差C.W經(jīng)差、N緯差D.W經(jīng)差、S緯差
A.E經(jīng)差、N緯差 B.W經(jīng)差、S緯差 C.E經(jīng)差、S緯差 D.W經(jīng)差、N緯差