题目

American parents usually think that their child should not have more pocket money than the children with whom he regularly connects no matter they are wealthier or not than he. Whatever the pocket money is, its entire use is not controlled by the parents, because a child learns to use money correctly only through dealing with it himself. If a seven-year-old child gets a quarter as a week pocket money and is made to put it all in his piggy bank to save it up, he gets no idea what the real use for the money is. He gets the shiny coins and they soon disappear. The idea of a bank account( 下列化学用语正确的是 [　　] A． I－131：I B． Cl－的结构示意图： C． 二氧化硫分子比例模型： D． Na2S的电子式：