下列变化中共价键被破坏的是( ) A.干冰(CO2)升华 B.氯化钠的的熔化 C.氯化氢的溶解 D.水的气化 答案:C判断问句与答语是(T)否(F)一致。(____)1、A.Good morning. B.Goodbye. (____)2、A.How many boys? B.Five. (____)3、A.Is it a dog? B.It’s on the desk. (____)4、A.How are you? B.I’m nine. (____)5、A.Happy birthday. B.Happy birthday.