单项选择题
The distance between any two meridians measured along a parallel of latitude and expressed in miles is the （）.
A.difference in longitude B.mid-longitude C.departure D.meridian angle
单项选择题 The distance between any two meridians measured along a parallel of latitude （）.
单项选择题 On a voyage from Halifax,N.S.,to Dakar,West Africa,the Canary Current will （）.
单项选择题 On a voyage from Capetown to London，the favorable ocean current off the coast of Africa is the （）.
