The drawing that Jian Si Ning was finishing was pulled away by his teacher. This middle-aged man in his forties was the counselor of their class and was temporarily serving as a substitute teacher of physics. Their major had to learn the basic knowledge of physics in order to lay a theoretical foundation for their professional courses.
Because of his ugly appearance and odd personality, many people privately called him an old weirdo.
His teaching is too rigid, and it is hard to arouse people's interest in listening to his lectures.
But he was very strict and would never allow anyone to be absent from his class. And there were rumors that this old man Ran favored boys over girls. He looked down on women from the bottom of his heart and believed that women were not as good as men in terms of logical thinking and learning ability.
In short, Jian Sining's behavior had offended him.
However, as soon as he opened his mouth, his tone was very harsh. If it were a fragile person, they would probably cry on the spot.
"The country spends money to support you, is this how you repay the country? Being half-hearted in studying and doing unimportant things, is this your attitude to repay the country?"
Currently, there is no tuition fee for attending university, and there is also a monthly scholarship of 10 yuan and a subsidy of 35 kilograms of food coupons.
That's why Old Monster Ran said such a thing.
Jian Si Ning explained seriously: "What you said..."
Ran Laoguai didn't give her a chance to speak: "Even if you raise pigs, you can still kill them and eat the meat. Have some people ever thought about their own value as human beings? Are they worthy of the country's cultivation? If you don't want to learn from the beginning, why waste educational resources? Isn't it better for your children to raise pigs?"
"Hahaha..." More than a dozen male students in the class couldn't hold back their laughter, and the other three female students stared at Jian Sining with different expressions.
Some are sympathetic, some are indifferent, and some are cold and angry.
Jian Si Ning got angry. Respect is a mutual thing. Since the other party didn't show any mercy to her, there was no need for her to indulge him.
"Teacher Ran, I have basically mastered the basic theoretical knowledge you taught me, so I don't think I should be humiliated by you for drawing the design drawings without affecting other students."
Ran Laoguai pushed up his glasses and said with disdain: "What? You have already mastered the theoretical knowledge in my class?"
"Yeah, so I'm just using my time wisely."
"How dare you brag? How can you prove that you have mastered everything?"
"Please feel free to ask."
Jian Si Ning's "arrogance" attracted the attention of the whole class, and Teacher Ran looked like he was going to teach her a lesson. Anyway, he didn't believe that a female student could have any profound attainments in physics.
"Well, if you can answer all the questions I asked, you can do whatever you want in my class from now on. But if you can't answer them, I will require you to memorize all the lessons learned during today's break, and I will deduct one month's living allowance from you."
"Okay." Jian Sining agreed without hesitation.
"Hmph~" Ran Laoguai lowered his eyelids, "I won't ask any deep questions, I'll just ask you some physics common sense you learned in middle school. If you can answer them, I'll consider you the winner."
Jian Si Ning was about to laugh. How much did he look down on female students by asking questions to lower-grade university students?
"Do you know why doctors' stethoscopes can hear sounds?"
"This is based on the principle that sound travels faster in solids than in gases. There is a vibrating plate in front of the stethoscope, which vibrates with the vibration of human organs. At this time, the sound will be clearly transmitted to the ear through the rubber tube."
When Old Monster Ran saw that she actually answered the question, a hint of embarrassment flashed across his face.
"These questions are common sense, and it's not uncommon to answer them correctly. Next...how do people hear sounds?"
"Through air conduction, the auricle collects the sound waves generated by the vibration of the air and transmits the sound to the eardrum through the external auditory canal. The sound waves make the eardrum vibrate, thus generating signals that are transmitted to the auditory system, which then transmits them to the brain, and we hear the sound."
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