题干
He sits me in the classroom. I can't see the blackboard clearly.
A：in front of
B：in the front of
C：at the back of
D：behind
答案(点此获取答案解析）
A
He sits me in the classroom. I can't see the blackboard clearly.
A：in front of
B：in the front of
C：at the back of
D：behind
图中与其化学性质相似的元素是