單項(xiàng)選擇題
A.127°54′05″ B.127°56′23″ C.128°00′59″ D.128°03′17″
A.48°53′00″ B.48°50′15″ C.48°47′30″ D.48°55′45″
A.–0.010m B.–0.007m C.+0.005m D.+0.007m