题目

On a Friday night, a poor young violinist was playing his violin at the entrance（入口）of the subway station. The music was so great that people put some money into his hat. The next day, the violinist came to the entrance again. He put down his hat as usual. Beside the hat was a piece of paper with some words on it: “A George Sang has put an important thing into my hat by mistake. Welcome to claim（认领）it.” After a while a man named George Sang ran here quickly and got back his important thing. The important thing was a lottery ticket（彩票）. Sang bought it and won a下列与无机盐的功能无关的是（  ）A．是细胞中能源物质之一　　B．是某些重要复杂化合物的成分C．能维持生物体的生命活动D．能维持细胞的形态和功能