A.分子晶体中一定不含离子键 | B.分子晶体中一定含有共价键 |
C.离子晶体中一定只含离子键 | D.离子晶体的熔点一定比共价化合物高 |
A.CaCl2 | B.Na2O | C.H2O | D.NaOH |
A.HF | B.HCl | C.HBr | D.HI |
A.SO3 | B.CH4 | C.NH4+ | D.H3O+ |
A.干冰气化 | B.HCl溶解于水 |
C.食盐融化 | D.NH4Cl受热变成气体 |
A.H2O | B.MgCl2 | C.NaOH | D.CH3COOH |
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