题干
—Listen! Someone is playing the piano.
— Wow! beautiful music! I like it very much.
A：What
B：How a
C：What a
D：How
答案(点此获取答案解析）
A
—Listen! Someone is playing the piano.
— Wow! beautiful music! I like it very much.
A：What
B：How a
C：What a
D：How
中，若
，则
的值为（ ）
请你根据以下各元素的原子结构示意图判断，与氮元素具有相似化学性质是（ ）
