A long joke before bed

A boss of B club caught a glimpse of a young man in an alley and asked him: What is one plus one? The young man was afraid, thought for a long time and said, it's equal to two. The boss of B club quickly took out his hand and shot. Leave a message when you leave: You know too much. .

A and b can be transformed into each other. B can produce C in boiling water, and C can be oxidized to D in air. Smells like rotten eggs. What are a, b, c and d? Answer: a chicken b eggs c cooked eggs d rotten eggs. .

The teacher asked us to do the test paper. The teacher said that if it is difficult, you can not do it. The next day. The study Committee put away the test paper, and the teacher vomited blood with anger. None of the boys in the class did it. The teacher said angrily to the class, why don't the boys do it? The boy replied, the teacher said it himself, but that man didn't.