A:一定含有Na,C,O
B:一定含有Na,C
C:可能只含有Na,O
D:一定没有O
Food is very important to our health. Everyone needs to eat well if he or she wants to have a strong body.Our minds, like our bodies, always need the best food. This kind of food is knowledge. We start getting knowledge when we are very young.
〔滚绣球〕有日月朝暮悬,有鬼神掌着生死权。天地也!只合把清浊分辨,可怎生糊突了盗跖、颜渊?为善的受贫穷更命短,造恶的享富贵又寿延。天地也!做得个怕硬欺软,却原来也这般顺水推船!地也,你不分好歹何为地!天也,你错堪贤愚枉做天!哎,只落得两泪涟涟细细品味〔滚绣球〕,体会窦娥对“天地”的情感如何变化?