题目

若NA表示阿伏加德罗常数，下列叙述中不正确的是       A.16 g O2与O3混合物中所含电子数为8NA       B.标准状况下，2.24 L CH3OH分子中共用电子对数为0.5NA       C.6 g SiO2晶体中硅氧共价键数为0.4NA       D.0.1 mol 13C18O中所含中子数为1.7NA 答案：BWith his wallet ________, Mr Bill ________ return home to face his wife. [　　] A．stole; need not toB．stealing; dare not to C．stolen; needn't toD．stolen; dared not