— Through “Didi”. It is easy.
A:how you came back home
B:why you came back home
C:when you came back home
— will the 6th Chinese Film Festival in France last?
—From May 24th to July 19th.
Good _______ .
设U=Z,A={1,3,5,7,9},B={1,2,3,4,5},则图中阴影部分表示的集合是 ( )
写出下列反应的化学方程式