Why do we need to cover so much here? Because, Zheng Jian was ruthlessly caught because he was sleeping and snoring too loudly, and stood up to answer the question. Pen & Fun & Pavilion www.biquge.info

"This classmate, can you get up and answer under what conditions should a circuit be analyzed by distributed parameters?" The old witch can't see the students, they don't do their jobs, they don't want to make progress, they don't like to learn. Especially students like Zheng Jian who still sleep in class.

"This, that. Teacher, me. Teacher, can you let me go? "Zheng Jian has been hesitating for a long time, but he can't answer.

"Forget it, it looks like you don't know. I'll ask one more student to answer first! You, just you! As a result, she pointed to Qin Huachi, who was deserting next to Li Qian.

Of course, although Qin Huachi was deserting just now, the foundation was still there, so he thought for a while and quickly replied: "The circuit with aggregate parameters and the circuit with distributed parameters are divided according to the size of the circuit and the wavelength of the signal transmitted in the circuit. When the geometric size l of the transmission line is comparable to the wavelength λ corresponding to the operating frequency, the transmission line can no longer be analyzed by the circuit theory of lumped parameters, but should be discussed by the circuit with distributed parameters. That is, when λ<100L conditions are satisfied, the circuit can be analyzed according to the distribution parameter circuit. Teacher, I'm done. ”

"All right, good boy. Is this an example of a good child? Sit down, don't get tired. "The old witch's treatment is really different, she speaks ill of Zheng Jian, and she is as warm as spring to Qin Huachi.

Zheng Jian said that he was hurt, but he definitely did not dare to show it.

"Son, do you see? That's the model of serious class. You! It's a negative teaching material, everyone should take it as a warning! You can just stand and listen to these two lessons! With that, the old witch walked back to the lectern and began her lesson.

Hmph, just two classes. What's so hard about that? I think that Brother Jian and I can squat for a day, wouldn't it be too pediatric to stand for two classes. Look at my brother Jian's invincible standing and sleeping Dafa.

So, Zheng Jian fell asleep while standing. This can surprise Fu Pai and Du Yuan next to him, and they can actually fall asleep. deserves to be a brother, awesome. The two of them gave Zheng Jian a thumbs up.

The old witch went on to lecture again.

"What is a uniform transmission line?" The old witch paused as she got to this point, deliberately making the students think for a moment.

"When we study transmission lines, we have to take into account not only the resistance of the wire, but also the inductance, capacitance and leakage conductance associated with the wire. A transmission line is considered to be uniform if the resistance and inductance of the transmission line, as well as the conductivity and capacitance between the transmission lines, are uniformly distributed along the line. That is, in a section of the length of the transmission line, if its parameters are the same everywhere, then the transmission line is called a uniform transmission line. Just when she thought that the students had thought it through, given the correct answer, and were complacently preparing for a more in-depth analysis, a voice that was not so harmonious rang out.

"Snoring, snoring." Zheng Jian's snoring was very rhythmic, and the sound was louder and louder, like the waves of the sea, and the waves were higher than the waves. The whole class didn't react at first, but when they did, they all fainted with laughter. Haha, it's so funny, just fall asleep standing up, the snoring is still so loud. This Zheng Jian, needless to say today, will definitely die.

At the same time, the snoring made the old witch angry. This classmate Zheng Jian, if you don't listen to the class carefully, you can actually fall asleep at the penalty station, you sleep with you, in fact, you are not so angry, but you snoring so loudly, disturbing other people, this is unbearable.

"This classmate, wake up. The guy next to him, wake him up. The old witch screamed twice, and found that she had not woken up, and had slept so soundly! Is my class so hypnotic? This made the old witch really unbearable, so she asked the people next to her to wake up Zheng Jian.

Seeing this, Du Yuan immediately pulled Zheng Jian's clothes a few times. Zheng Jian: Is this sleeping soundly? I also dreamed that I robbed a big boss again, and this time I directly exploded an artifact, and suddenly someone was pulling his clothes and asked him not to pick it up. How can this work, so Zheng Jian waved his hand, and the fat man's hand was snapped open, and his hands were swollen, but Zheng Jian still didn't wake up.

This can make the old witch angry, this classmate Zheng Jian is simply lawless, just sleep and snore by himself, the classmate next to him kindly went to pull him, he actually beat people, and continued to pretend to sleep after the fight, it's too hateful.

This is really something that an uncle can bear, but an aunt can't. So, the old witch picked up the chalk and threw it at Zheng Jian's body.

"Well, there's a murderous aura. No, it's a hidden weapon, I'm hiding. Zheng Jian was in a dream, he was just about to pick up the artifact when he suddenly found a hidden weapon attacking, and quickly turned sideways to dodge.

Hmph, even if you're asleep, you can dodge the chalk? He still pretended to be asleep. See how the teacher cleans you up?

You can hide one of them, I'll see if you can hide from a box. After thinking about it, the old witch picked up a box of chalk, threw the box and took out all the chalk inside, and then threw it at Zheng Jian.

"Well, the murderous aura is getting heavier and heavier. There are really a lot of hidden weapons this time, and there are about twenty-three hidden weapons when I hear this sound of breaking the air. However, Zheng Jian was not worried, because he had already touched the divine sword on the ground, and then took the divine sword and kept slashing at the twenty-three hidden weapons. and hit all the hidden weapons back. After the fight, he also blew the sword light on the Excalibur.

However, the people in the classroom don't see it that way. At the same time, the people in the classroom were also stunned, because Zheng Jian picked up a book and fought back, and the old witch was smashed by the chalk he threw out. There was chalk ash all over the body. It's as funny as it gets.

This time, the old witch finally couldn't help it, and rushed over while shouting and preparing to fight with Zheng Jian, after all, she had worked to teach for more than thirty years and had not been insulted so much, or in front of the whole class.

However, fortunately, Long Yu, the only person in the class who knew what was going on, jumped out of his seat and hugged the old witch fiercely. And persuaded: "Teacher, don't go over." He's now asleep in self-defense and counter-attack, you used to be dangerous. ”

"What a mess of self-defense counterattacks, and there are dangers. I still don't believe it, he pretends to sleep and throws me chalk, just forget it, do you dare to beat me? The old witch was not very conscious now, and roared loudly.

"Teacher, don't you think this will work. I'll help you hit him, and you'll watch. You'll understand after watching it for a while. After saying that, Long Yu didn't wait for the old witch to agree, returned to his seat, picked up the nunchucks, and walked over to Zheng Jian.