【多选题】有人建议将氢元素排在元素周期表的VII A 族。下列事实能支持这一观点的是 ( )
A.
① H 原子得到一个电子实现最外电子层稳定结构;
【单选题】下列叙述正确的是 ( )
B.
两种非金属元素形成 AB 型化合物,它一定含共价键
【单选题】There is "h" in the word "hour".
【单选题】There is no difference in structure between the self-contained heart and the mechanical heart.
【单选题】There is "h"in the work "hour".
【简答题】Thereis “h” in the word “English”.A. / B. a C. an