题目

He hated the war so much that he decided to leave the army _____. A. for long    B. once in a while  C. for good    D. once upon a time 答案：C 解析: for good (=permanently)永久地:He says he's leaving the country for good. for long 长久地。按本题题意，用 for long 不妥。once upon a time 从前。once in a while 偶尔。在密闭容器中，把20℃时硝酸钾饱和溶液升温至80℃，下列说法中不正确的是 [　　] A．溶液的总质量不变 B．溶剂的总质量不变 C．溶质的质量分数变大 D．溶质的总质量不变