A:北半球、西半球
B:北半球、东半球
C:南半球、西半球
D:南半球、东半球
下列自然现象与太阳辐射无关的是( )
4个 16 连加的和是____。
It was a difficult time for the relatives of Missing MH370 passengers when they heard the bad news, but they didn't ________ hope.