Little Cutie, you haven't subscribed enough to this article yet. You can read the latest content if you make up for it. However, Song Yu seemed to be cut off from the rest of the world. He didn't react at all. He had even drawn half of a mind map on the blackboard. Behind him, the entire class was holding back their laughter as they put on a wonderful pantomime. The only accompaniment was the sound of the self-heating rice. It was comparable to the increasingly passionate symphony in the Golden Hall.
Not only that, but the experience was in 4D. White steam wafted out of Le Zhishi's drawer, and the aroma of shredded pork with garlic sauce.
He had wanted to eat secretly, but now, the entire class, including Song Yu, knew that he was cooking.
Le Zhishi gave up completely. In his mind, he could already imagine himself being chased out of the classroom and squatting in the corridor to eat.
He felt that he was now a very experienced person. He could go to Zhihu and answer the question "What is the experience of social death?" anonymously.
Finally, after ten long minutes, Song Yu turned around expressionlessly and put the half-used chalk on the desk. "This is what I'm going to say next."
The sound of the self-heating rice started to sound like a deflated balloon. The sound became more and more listless. Le Zhishi's head was now hanging on the desk.
"The first part is to find your weakest link. You all know the bucket effect," Song Yu said as he left the podium as expected.
The students below the podium hurriedly put away their phones. The students at the front were still looking at Le Zhishi with the mentality of watching a good show.
The person who was rumored to have bullied his younger brother was now teaching the class. Coincidentally, he had caught his younger brother eating in class. It wouldn't be right if he didn't teach him a lesson.
"Systematically sorting out the wrong questions is an effective method. Making mistakes is not scary. Everyone makes mistakes. The scary thing is that many mistakes will be repeated and will eventually lead to losing points. So what you should do is to reduce the frequency of the same mistake. "
As he spoke, he had already walked to Le Zhishi's side, his slender hand seemingly unintentionally supporting himself on his desk.
He spoke calmly and logically, from the topic of sorting out the wrong questions to the techniques of scoring multiple-choice questions, such as the graph combination method, the substitution method, and so on. But Le Zhishi was like an ostrich. Other than the sound of his own heartbeat, nothing else entered his ears.
Song Yu seemed to be tormenting him on purpose. He just stood beside him and talked, not going anywhere.
"… This is part of the multiple-choice question. Now, use the questions at hand to practice the multiple-choice questions I just talked about. You have ten minutes. " With that, Song Yu finally lowered his head and looked at Le Zhishi, who had been playing dead all this time. He tapped his knuckles on the table gently.
Only then did Le Zhishi raise his head pitifully. With an expression that said, "I know I'm wrong." He obediently took out the self-heating rice box that he had hidden in the drawer.
Song Yu raised his eyebrows and asked in a low voice, "Does it smell good?"
Upon hearing this, the surrounding students could not help but laugh out loud.
"It's okay," Le Zhishi answered very honestly. He then added in a low voice, "It smells good."
Jiang Yufan was a loyal person. When he saw that Song Yu was in a difficult position, he immediately helped him explain, "Senior, I bought this. I bought it wrong. It's my fault. I can write a self-reflection letter. "
Seeing that he wanted to take responsibility, Le Zhishi immediately said, "No, I wanted to eat it myself."
Zhang Chen did not mind the drama. "Senior, I can prove that Le Zhishi ate it. They had been secretly discussing for a long time. They wanted to eat self-heating rice during the evening self-study session. "
Jiang Yufan was furious. "Do you have the right to say that? It's as if you have never eaten takeout during the evening self-study session. Besides, he didn't plan to eat it in the classroom. "
The two of them argued. Song Yu's eyes swept across the laughing students. Everyone seemed to be looking forward to his punishment. Finally, he spoke expressionlessly.
"I'll take this opportunity to explain the principle of self-heating rice to everyone."
Zhang Chen's face was filled with disbelief. This was completely different from the way he had imagined he would be punished.
Not paying attention to the whispers of the surrounding students, Song Yu picked up the lunch box on the table. "Look here."
"There is a heating pack at the bottom of the self-heating rice box. It contains quicklime, sodium carbonate, aluminum-magnesium mixture, and other chemicals. Quicklime, which is calcium oxide, reacts with water to form calcium hydroxide. At the same time, it releases a large amount of heat. Sodium carbonate often plays an auxiliary role. Aluminum-Magnesium powder can also release heat through the oxidation reaction. So when we add water, the heating pack will work and automatically heat the food. "
He lowered his head and met Le Zhishi's surprised eyes. He continued, "However, this kind of self-heating fast food has the possibility of explosion. The freshness of the food is also not enough. I don't recommend that you eat it often."
After that, Song Yu put down the lunch box and pointed to the blackboard. "I've written a few related reaction equations on the bottom right corner of the blackboard. Students who are interested can take a look."
Le Zhishi looked at the equations on the blackboard. It turned out that he already knew what was going on at that time and calmly wrote it down.
At first, everyone just thought it was funny and wanted to watch the fun. They didn't expect a social death to happen in chemistry class. They were a little confused. The miraculous thing was that they had learned some of these reactions before, but they had never connected them to their daily lives. With such a comparison, it was a magical feeling.
"Combined with the example just now," Song Yu leaned on Le Zhishi's table. "Everyone should never forget that calcium oxide reacts exothermically with water."
Everyone laughed in unison. However, Zhang Chen was obviously not satisfied. He raised his hand and said with a sneaky expression, "Senior, why is there a sound? It's too funny. "
He obviously wanted everyone's attention to return to the sizzling sound of the self-heating rice.
Song Yu leaned on the table and didn't answer directly. Instead, he looked at the other students. "You guys should have done chemistry experiments. Can anyone tell me which chemistry experiments you've done that produced a special sound? "
A girl whispered, "Sodium and water …"
Song Yu nodded to her. "This example is very classic. Many chemical reactions produce sounds." He deliberately looked at Zhang Chen who deliberately asked the question. "There's nothing to be surprised about."
Zhang Chen's face quickly fell. He clearly felt a hint of sarcasm in the other party's cold tone.
"In addition to the reaction itself, the exothermic process also produces a large amount of water vapor. The collision also produces a sound. This process involves a lot of reactions similar to a galvanic cell. This is something you guys haven't learned yet. "
Song Yu lowered his head and glanced at him. "I believe … if Le Zhishi classmate knew the principle behind this from the beginning, he wouldn't have chosen to heat up the self-heating rice in a quiet environment."
Le Zhishi classmate.
This name sounded strange to Le Zhishi, but for some reason, it evoked a trace of joy.
Although Song Yu's expression was still cold, it didn't mean to blame him. Clearly, every sentence was to popularize chemistry knowledge, but everyone could hear the hidden meaning of exculpation.
Le Zhishi thought that now, at the bottom of his anonymous answer, he could update it with a real-time "I'm alive again!". No, he could even cancel his anonymity.
While he was in a daze, a broad palm fell on his head and rubbed his fluffy soft hair. It was very brief and very light. He didn't react. He only felt the hand leave his head, but it left behind a sentence.
"If you don't eat it, it'll be cold."
This head rubbing came so suddenly that the surrounding students were a little surprised.
The rumor that the relationship between the so-called brothers was very bad collapsed under Song Yu's extremely rare intimate contact.
Le Zhishi didn't even raise his head. "I'm going out to eat."
After he finished speaking, he took the lunch box and walked out a little absent-mindedly.
The bathroom was on the right side of the staircase, next to the washroom. Le Zhishi saw that there was no one and slipped in. The taste of the convenience food was very ordinary. The rice was very hard, and the vegetables were a little too salty.
He was in a daze as he chewed. After swallowing, he raised his hand and touched the top of his head. He lowered his head and took another big bite.
He was so hungry that he didn't feel hungry. After what happened just now, Le Zhishi didn't have much of an appetite. He was thinking about Jiang Yufan saying that he wanted to try the food, so he didn't leave after eating. But little Jiang Yufan had experienced too much and couldn't remember anything. He waited for five minutes, but he still didn't come.
Song Yu was still in class. Le Zhishi didn't want to waste too much time, so he cleaned up and went back to the classroom. When he reached the door, Song Yu was standing on the podium and talking about the revision plan for English. He stood at the door and called out softly but didn't enter directly.
Hearing his voice, Song Yu nodded at him and continued to talk as if nothing had happened.
Le Zhishi quietly returned to his seat and listened to the lecture with the other students. During the entire class, Song Yu, who didn't bring any materials with him, only spent ten minutes to sort out the context of the mind map. Then, he led everyone through it with a clear train of thought. The ease with which he handled it even exceeded that of many teachers.
"Time is limited. That's all for now." Song Yu stood sideways and looked down at his watch. The first evening self-study period was about to end.
"Le Zhishi."
Hearing his name being called, Le Zhishi was stunned and quickly looked up at his brother.
Song Yu's chin pointed in the direction of the blackboard. "Wipe the blackboard."
Le Zhishi immediately nodded obediently. "Okay." He was about to stand up as he spoke.
Growing up, Le Zhishi's biggest fear was that Song Yu would ignore him, especially after he did something wrong. But if Song Yu scolded him or gave him some form of punishment, it meant that he wasn't angry.
Song Yu wouldn't speak when he was really angry.
They knew each other well enough.
"Don't wipe it." The girl taking notes looked up. She hadn't been paying attention during the lecture and was now rushing to copy the blackboard. "I haven't finished copying yet." The others chimed in. Le Zhishi was in a bit of a dilemma.
Song Yu glanced at them indifferently. "Since your phones can be used to chat, you should be able to take pictures too."
Everyone was stunned by this sentence, especially those who were gossiping and laughing in the group.
The bell rang and Song Yu left the classroom. Le Zhishi did as he said and wiped the blackboard. Jiang Yufan was a loyal friend and took another blackboard eraser to accompany him. "Was the meal good?"
"It was okay." Le Zhishi looked at him. "I waited for you for five minutes, but you didn't come."
"So you were waiting for me for half a day. I was wondering why it took so long. I forgot about it. " Jiang Yufan rolled up his sleeves. "Zhang Chen, that idiot, even said that you were too embarrassed to come back. I'm so angry. You can't win her heart, so you take it out on others."
Le Zhishi waved his arms and wiped the blackboard vigorously. He didn't care much about what others said when he wasn't around. "He's just addicted to talking for a day or two. If the person I like likes someone else, I definitely won't be happy. "The hand holding the eraser suddenly paused. Le Zhishi's eyes stopped on the few lines of equations in the corner.
This was the last unfinished task in the elimination task Song Yu gave him.
"Do you have your phone with you?" He turned to look at Jiang Yufan, who was dusting.
"Yes, why?" Jiang Yufan took out his phone and handed it to him. "You only remembered to take a picture now? It's all gone."
Le Zhishi didn't say anything. He used his phone to take a picture of the few lines of equations in the lower right corner.
"Thank you. Send this to me."
Thinking of this, Le Zhishi's expression became a little depressed. When Song Yu handed him the alcohol cotton swab, he shrank back and apologized in a low voice. "I'm sorry."
Song Yu didn't respond to his apology. Instead, he reached out his other hand and held his chin. "Don't move."
As soon as he said that, Le Zhishi really didn't move. However, his mind began to wander. He remembered that in school, whether it was when he won a speech competition or when he was knocked down while playing basketball, Song Yu had never taken the initiative to approach him. They were very serious about playing the role of strangers.
So now, Le Zhishi was even a little grateful that his sudden asthma on the first day of school forced them to reveal their complicated relationship. Walking together seemed very open and aboveboard.
Seeing that he was in a daze, Song Yu said casually, "Is it good?"
Le Zhishi pulled himself out of his thoughts. After hearing this, he was very sure that Song Yu was mocking him.
"I accidentally inhaled it." He frowned.
This scene reminded Song Yu of when they went to the dentist together when they were young. Le Zhishi ate candy until his mouth was full of tooth worms. Lin Rong took them to the dentist's office. As soon as he heard the sound of the electric drill, Le Zhishi opened his mouth and cried. He grabbed his hand and wouldn't let go.
Song Yu continued to wipe, and his tone was neither fast nor slow. "What's the smell?"
"Cantaloupe." Le Zhishi described truthfully. "At first, it was sweet, but then it became a little disgusting, like fever syrup."
He could describe it in such detail.
After that, Le Zhishi spat out a little and wrapped it in paper. "Could it be that the person who made the refill guessed that someone would inhale it, so he deliberately made it sweet?"
You've already exceeded your reading limit for today. If you want to read more, please log in.
Login
Select text and click 'Report' to let us know about any bad translation.
