She felt herself _______ by her friends. A.misunderstand B.misunderstanding C.misunderstood D.to misunderstand 答案:C12.NA表示阿伏加德罗常数的值.下列叙述正确的是( )A.标准状况下,22.4L CHCl3含氯原子数为3NAB.100mL 1 mol•L-1醋酸溶液中的氢原子数为0.4NAC.常温常压下,11.2g乙烯中共用电子对数为2.4NAD.6.4 g CaC2晶体中所含的离子总数为0.3NA