Huijin No. 2 Middle School.

After Chen Nan returned to school, he fell asleep on the table.

Chen Nan is a senior high school student in Huijin No. 2 Middle School, because Chen Nan's grades are ranked first in the school in every exam, so he is famous in the whole school.

Every day, he has nothing to do, except to sleep or sleep, many teachers have given up on his treatment, but some teachers still can't stand it and often scold him.

But he ignored all the advice of his teachers, one ear in, the other out. There are very few friends around him, and there is no girl who likes him at all.

Chemistry class.

Jingle bells.

"It's class, I didn't hear it, are my ears deaf!" After the class bell rang, the stern chemistry teacher walked in and knocked on the podium angrily with a straight face.

When the students saw the teacher come in, they immediately fell silent, and no one dared to make a sound.

The chemistry teacher was one of the strictest and most vicious teachers in their middle school, and even his usual tone of speech felt like he was scolding. He doesn't pay special attention to people with superior grades, he treats everyone very strictly, and for several years, his classmates don't seem to have seen the smiling face of a chemistry teacher.

However, for Chen Nan, he doesn't want to care about him anymore.

As soon as he saw that this class was a chemistry class, a classmate named Zhang Zicheng was overjoyed. Because chemistry is his best subject, many of the alchemy pills in the pharmacy are made by him, and he once developed a special cultivation pill by himself, but it was not valued by the academy. But he was often complacent about his slightly superior results.

And for this person who is complacent with a little achievement, the classmates in the class hope to extinguish his prestige, but they are indifferent.

When he succeeded, he would get carried away and say to the people in the class: "How about it, my grades are higher than yours, what do you want to do with me?"

"In today's lesson, we're going to learn how to make stomach medicine. The chemistry teacher said in a stern tone with a straight face, and took the chemistry to the podium.

"Gastric medicine is made from hydrogen and oxygen, dissolved in water with a large amount of alkaline solids. The main use is for the treatment of gastric acid, the principle is neutralization with alkaline solids. ”

"Before teaching you how to make stomach medicine, I want to draw some classmates to answer the questions, and if I can't answer them, I'll stand in the back of every class this week!"

The chemistry teacher stood on the podium and spoke, and no one dared to resist or give any opinion.

He swept his gaze around the classroom, and his eyes were very sharp as he scanned them, and before he could reach a certain place, the students in that place had already buried their heads deep under their desks.

Sweeping and sweeping, he suddenly frowned.

Zhang Zicheng, who was under the podium, did not change his usual style, held his head high, looked at the chemistry teacher confidently, and couldn't wait to stand up and answer, so as to make a splash among his classmates.

But the chemistry teacher ignored him as if he hadn't seen him. On the contrary, Chen Nan, who was beside Zhang Zicheng, lay on the desk and fell asleep.

Alas.

The chemistry teacher sighed, he didn't want to say anything more about such a student.

"Zhang Mengjia, you can answer!"

Hearing that the teacher was not called by his own name, Zhang Zicheng pouted very unpleasantly.

"I, I won't. ”

Bang!

A piece of chalk head was thrown over.

"Copy the textbook a hundred times!"

"Zheng Xinyi, you can answer!"

"Me. Neither will I. ”

Bang!

"A hundred times!"

Zhang Zicheng looked at the classmates who stood up but couldn't answer, and felt very gloating.

"Zhang Zicheng, what are you laughing at there, let me ask you, have you studied well?" the chemistry teacher glared at him with resentful eyes and scolded him harshly.

"Yes, why don't I answer that?"

"Don't think you're amazing, you'll have a question to do!"

With that, the chemistry teacher turned around and drew some pictures on the blackboard.

"I repeat, lab-produced oxygen is catalyzed by the catalyst manganese dioxide to accelerate its decomposition, or to heat the potassium permanganate solution, and then pass it into a gas collection cylinder, long in and short out. Laboratory hydrogen production is to put zinc particles into dilute sulfuric acid, and then pass into the gas collection cylinder, short into the strength. You guys, do you understand?"

The following are all brushed and brushed towards the notes on the blackboard.

Only Chen Nan and Zhang Zicheng did not look at the blackboard, one fell asleep soundly on the desk without paying attention to the teacher at all, and the other raised his head and looked at the blackboard with his head held high.

"Zhang Zicheng, don't you think you're amazing? Okay, you stand up for me and answer the question!"

"No problem!" Zhang Zicheng swooped to his feet.

"Some drugs are made of acidic liquid and alkaline liquid mixed into neutral before they can be used, and if the drug is made with too much acidic solids, it is easy to produce gastric acid in the stomach. Please, how to treat stomach acid. ”

"Hmm---" Zhang Zicheng thought to himself, scratching his scalp, "neutralize it with an alkaline solid or solution." ”

"What solution or solid to use. ”

"Sodium bicarbonate. ”

"How to get sodium bicarbonate. ”

"Sodium carbonate is passed into an aqueous solution of carbon dioxide. ”

"How to get sodium carbonate and carbon dioxide. ”

"Add hydrochloric acid to the calcium carbonate solution. ”

"How to get calcium carbonate. ”

"Carbon dioxide is introduced into the clarified lime water to produce precipitation. ”

"How to make carbon dioxide. ”

"Add hydrochloric acid to calcium carbonate. ”

"How to get calcium carbonate. ”

"Put ...... Uh, O, passes carbon dioxide into an aqueous solution of sodium hydroxide. ”

"How to make carbon dioxide!"

"Uh..... Calcium carbonate is burned at high temperatures!."

"How to make calcium carbonate!"

"Carbon dioxide is passed through the clarified lime water. ”

"How to make carbon dioxide. ”

"Add hydrochloric acid to calcium carbonate. ”

"How to make calcium carbonate. ”

"...... in clarified lime water"

Speaking of this, Zhang Zicheng was stunned, he found that he was going in circles in place when he answered, and he felt that he had walked into a maze given to him by the teacher, and he couldn't find the exit when he walked around.

"Tong ...... Open...... Oxygen dioxide, carbon reduction. Zhang Zicheng's tone became smaller and smaller when he said this, and the last few words could be heard by no one else except him.

Da!

The chemistry teacher threw the chalk head over.

"You think you're sorry, don't you, then you should answer it!"

"I, I ......"

"What are you, other people copy it a hundred times, you copy it five hundred times!"

"Ah, why?" Zhang Zicheng said with grievances.

"Why? Other people can't do the questions, at least keep their heads down, but you, you can't do it and pretend to be very good!"

"That's not ......"

"Shut up, copy it a thousand more times!" the chemistry teacher glared at Zhang Zicheng with an aggressive gaze.

"Don't say it, don't say it. Zhang Zicheng said with grievances.

"Sit down!"

Bah!

Zhang Zicheng felt that his chest was blocked, his face was full of unhappiness, he spat at him while the chemistry teacher turned around, and kept cursing in a low voice, he felt that the chemistry teacher was not here to teach at all, he was the kind of teacher who deliberately looked for students to be happy, he felt that it was strange that the teacher's teaching method could produce good students.

You wait for me, I'll kill you bullshit teacher in the future!

Then, the chemistry teacher's gaze began to scan the class again.

Seeing that Chen Nan was sleeping as always, he, as a teacher, couldn't help but want to say a few words to him.

"Hey, Chen Nan, stand up for me!" the chemistry teacher scolded sternly.

"Huh?" Chen Nan, who was in a daze, heard this, slowly raised his head and wiped his eyes, "What are you doing?"

"You, answer that question. ”

"What's the problem?" his dream was ruined by the teacher, Chen Nan said with some unpleasantness.

"How to cure hyperacidity!" the chemistry teacher scolded as he banged on the podium.

"Go to the pharmacy and buy stomach medicine!"

Chen Nan waved his hand impatiently and said disdainfully. Then he continued to bury his head in his arms and fell asleep.