题目

下列叙述正确的是( ) A.NaCl的摩尔质量是58.5 g B.64 g氧气中含有2 mol氧 C.4 g氦气中含有2 mol氦原子 D.0.1 mol CO2中含有6.02×1022个CO2分子 答案：D There are two buildings, stands nearly a hundred feet high． [　　] A．the larger B．the larger of them C．the larger one that D．the larger of which