—It was simply _______. He meant no offence by it.
A:his cup of tea
B:the apple of his eye
C:a child's play
D:a slip of the tongue
如图为某化学反应的微观过程,其中“”和“”表示两种不同原子.
(1)该反应属于____ (填基本反应类型)反应.
(2)虚线框内应填的微观图示是 ____ (选填A、B、C、D),你推断的依据是____.