题目

 I．请指出下列过程需要破坏的作用力 ①离子键  ②极性共价键③非极性共价键④氢键⑤分子间作用力 (1)干冰熔化             ；    (2）氢氧化钠溶于水________； (3)过氧化钠溶于水            ； (4)氯化氢气体溶于水____； (5)冰熔化______________；  II．写出下列物质的电子式： （1）N2                    (2)Na2O2                (3) NH4Cl             (4) MgF2                  (5) CO 2                    �As China grows stronger and stronger, Chinese ______ in more and more schools out of our country. A. teaches B. is taught C. has taught D. was taught