47. Auroras are more visible ________.
(A) in the winter in the Southern Hemisphere
(B) in the summer in the Northern hemisphere
(C) from middle latitudes
(D) from dusk to dawn
答案:登入後查看
統計: A(6), B(12), C(30), D(17), E(0) #1566131
統計: A(6), B(12), C(30), D(17), E(0) #1566131