"When the small slider slides down from the conveyor belt at a speed of 5m/s..."
On the blackboard, there are still those boring topics. The fat and wretched man is still talking passionately. The classmates in the audience are already drowsy.
Ahhhh, when does get out of class end? The boy with a sleepy face looked at the teacher in boredom, holding his head. "Buzz————" The vibration of the mobile phone made the boy who was about to fall asleep slightly wake up. Student Ruan Xiaowan, who secretly took out her cell phone and opened the cover, "poof", who could not control the volume for a moment, successfully attracted the teacher's attention. The naughty smile coupled with the mean voice sounded like a wretched uncle teasing an innocent boy. "Ruan Xiaowan, please answer, what does your smile just now have to do with our Mr. JJ in this chapter?" "..." The teacher's words successfully woke up all the students in the class. Even in such chaotic laughter, Ruan Xiaowan still heard the sound that made his teeth itch.