A:
B:
C:
图中大圆为晨昏圈,圈内为白昼。判断图中E点的昼长,以及沿劣弧由P点到Q点的方向为分别是( )
读我国玉米生产区分布图,甲、乙、丙、三大玉米生产区位于海拔( )米以下地区?
— Have you got the results of the final exam?
— Not yet. It will be a few days ______ we know the full results.