题目

A lot of us lose life’s battles by starting a frontal (正面的) attack when a touch of humor might well enable us to win. Consider the case of a young friend of Sam, who hit a traffic jam on his way to work shortly after receiving an ultimatum (最后通牒) about being late. Although there was a good reason for Sam’s being late—serious illness at home—he decided that the by-now-familiar excuse wouldn’t work any longer. His boss was probably preparing a dismissal (解雇) speech. Yes, the boss was. Sam entered the office at 9:35. The place was as quiet as a locker room. Ev室温下，过氧化氢溶液中加入少量二氧化锰后立即产生氧气，实验室常用这种方法制取氧气，下列各图中与该反应事实最吻合的是（　　）A．B．C．D．