题目

下列变化过程中，共价键被破坏的是A.干冰气化B.氯化氢气体溶于水C.蔗糖溶于水D.氯气被活性炭吸附 答案：B解析：B中HCl溶于水时电离为H +和Cl -,共价键被破坏。All the leading media in China        Premier Wen Jiabao’s official visit to South Korea and Japan. [     ]A.reportedB.printed C.announcedD.declared