题目

It seems strange that the old man _____ have returned to college to finish the degree he left undone four decades ago. A . would B . should C . could D . might 答案：B氯胺是一种长效缓释有机氯消毒剂，有强氧化性，其杀菌能力是一般含氯消毒剂的4～5倍，下列有关氯胺(NH2Cl)的说法一定不正确的是( )A．氯胺的水解产物为NH2OH(羟氨)和HClB．氯胺的电子式为C．氯胺中氯的化合价为＋1价D．氯胺的消毒原理与漂白粉相似