题目

设NA为阿伏加德罗常数，下列叙述正确的是( ) A．在含4 mol Si－O键的石英晶体中，氧原子的数目为2NA B．12g金刚石中含有的C—C键数目为4NA C．18 g重水（D2O）中含有的电子数目为10NA D．1 mol过氧化钠晶体中含有的离子数4NA 答案：A  The child broke his father’s favourite vase; Although knowing he would ____ to be punished, he told his father the truth.A．meanB．deserveC．devoteD．avoid