A joke that can warn or remind people.

In junior high school, a biology teacher once talked about the ecological environment on the African grassland, but no one in the class listened, so I got angry and said, "You all look at me! If you don't look at me, how do you know what African wildcats look like? "

In high school, I had my first labor class. The teacher was an old man and introduced himself: "My name is Wu Shushan." I immediately had a brainwave and immediately replied: "Looking at Chang 'an in the northwest, there are countless mountains. "The whole class laughed, the teacher was livid, and then I was punished for heavy work.

In an advanced mathematics class, the teacher asked my brother, "Calculus is a very useful subject. What is the goal of our study of calculus? " The man deserted at that time. Without thinking, he shouted, "No cavities!" " "The whole class burst into laughter.