A.What about my toy bear?
B.Is it on your bed?
C.No, it isn't.
Alice:Mum,where is my car? Is it in the toy box?
Mum:____ It's in the desk.
Alice:Oh,thanks.____
Mum:____
Alice:Oh,yes,it is.
非洲大陆上爆发的卢旺达民族大仇杀事件,说明了( )
当地球公转到图中B点位置时,不可能有的现象是( )