Zhang Deshi had a not very good idea in his heart, but after he saw the bottles and cans on it, he was not afraid, he liked the previous chemistry class the most.

This is something that can re-establish the Dao Technique, especially many Dao Techniques that he can't touch, and he can use it to exert himself.

So he liked it, but the teacher at the beginning never did too dangerous experiments for him, at most he came to a few small experiments, the movement was small and scary, and there was not even a trace of danger.

But he didn't know that this safety teacher was not the chemistry teacher he knew.

"Freshman?"

The safety teacher tried his best to make his tone soft, and at the same time said: "That's it, my experiment today is very interesting, you can come over and watch and be my assistant." ”

Zhang Deshi's eyes lit up, he liked this kind of work the most.

So he nodded abruptly and said, "Teacher, don't worry, I'm the man who likes chemistry the most, and when I took the exam, I won the top three in the class many times, and I like chemistry from the bottom of my heart." ”

When the safety teacher heard this, his eyes lit up, and he said in his heart, this student insists on asking for it, those students in the past, when they see him, they will always run away in a hurry, so how can it be done?

And Zhang Deshi, tsk, this is really a good student, but it's a pity that it's not a university now, if it were, he would definitely give the other party a little credit and let him pass directly!

That's right, the safety teacher came out of the university, and many of the experiments he studied at the beginning were called dangerous, and they were resisted by the whole class, so he had to settle for the next best.

Then he found his classmates in high school who were most curious, and the students of this period did not have much fear, and at the same time, they would not blindly accuse him of the black state, but he was really happy for a few years.

But then, after the students learned about his experiments, the previous feeling of rejection reappeared.

The safety teacher is very sad in his heart, everything he does, it is for the sake of the students, if these students don't even know a little bit of chemistry experiments, how can they get out in the future?

It's a pity that the students can't understand his hard work after all, although they won't complain, and everyone is very well-behaved, but they still reject him, and every time they take his class, they hide far away.

"In this way, classmate Zhang will come up directly." He took out his student book and glanced at it to see the last name.

Doing chemical experiments, there will inevitably be casualties, he always knows, who is what in the class, who is who, and when there is a big situation in the future, it is better to go to the roll call one by one.

Therefore, he was able to memorize the whole class, and now that he has an extra name, he can naturally distinguish it at a glance.

I have to say that this kind of ability is really powerful.

Other teachers, either can only distinguish between good and bad students, or can only remember most of them, as for all, although there are, but not much, first of all, the homeroom teacher can, secondly, the math teacher can also do, and the rest, it's almost meaningless.

Polarization, always have to be remembered!

Those who have experienced the student days probably know that there are two kinds of students, and the teacher will always remember them, one is those who are not good at learning and like to mischievous, and the other is naturally good at studying, good character, good morality, and good thinking...... And so on and so forth.

The average student may not be remembered.

This point makes many mediocre students feel that it is very futile!

After all, the people remembered by the teacher are either good or bad, and they may not be recognized by the teacher again after many years.

It's really sad.

"Okay!"

Zhang Deshi walked up with his hands, and then looked at Fang Mo's gloomy face and sat behind with a little fear in his eyes, he shook his head, very disdainful in his heart.

It's just a small experiment, so what's there to be afraid of?

"Today, we will talk about several ways to make gunpowder, cough, of course, it's just basic, you must not learn it, this thing, it will definitely make people crazy when it explodes, I will only talk about the most basic principles, and at the same time bring you a small experiment."

The security teacher looked at the students below and spoke slowly.

At the same time, lectures began.

How saltpeter can be used, how to make ice, how it will volatilize, and what will happen to sulfur, he did not say the specific ratio, because he also knew that this thing belonged to control.

But first of all, the formula of gunpowder still has to be left, what if there is any disaster in the future? So this thing is not very secretive, but it is just strict with the ratio.

The safety teacher explained in depth and concisely from the inside out, which made everyone listen to it with great addiction, and even more felt, why didn't the previous teacher have such a model? If so, will they still be scumbags?

Of course, no one will know, in fact, they are not too serious in other classes, after all, the history is not very detailed, and they can look up the encyclopedia when they go back, or go to check the information, but they are distracted in the safety teacher's class.

Ahem, what if the experiment fails, to run or not?

Maybe he was just outside the spirit object, and he felt an earth-shattering explosion appear, and then ...... That would be a complete tragedy.

So they subconsciously took this teacher's class very seriously, for fear of missing a section, which was forced out!

Maybe, the scumbag is because he hasn't been forced so often!

Of course, there are still some advantages to this, such as the chemistry level of the class, which is called a high, which can be said to be the most powerful in the whole grade.

They are suffering, and they always have to gain something.

Or, when they are completely out of high school, maybe they can go to a chemical factory to get a good job, even if they are scumbags, after all, with a mastery of chemistry, sometimes it is really easy to find a job.

Although in recent years, the country has vigorously developed environmental protection, but in the same way, some chemical plants have begun to transform rapidly, and the safety factor is very high.

Only in this way can we continue to do it, and as for some things that do not meet the safety factor, they will either be banned or replaced, and slowly disappear completely.

"Okay, now that we all know the reactions of these things, and what reactions will occur when encountered, it's time for our little experiment!"

The security teacher said this, showing a charming smile.

The whole class was stunned, and then they were even more engrossed, not daring to slack off in the slightest.

This evil smile is much more powerful than any Internet or TV, after all, what he is about to show is a gunpowder experiment that may endanger everyone's safety!

It's more dangerous than the last class!

But what about these students, in addition to showing surprise and fear at this time, the most is a sense of relief, after all, the teacher was able to accompany that classmate to the hospital a few days ago, which shows that his character is excellent.

And he was just the first to run away on stage that day!

There are very few people in the pit, only one Ma Pi.

"Okay, Zhang Deshi, right? You turn your head around first, I'm going to mix the gunpowder next, and all you have to do is put all the ingredients in it, and then we'll see a little experiment. ”

The safety teacher said to Zhang Deshi with a smile on his face.

As a university professor-level figure, of course he is qualified to master the gunpowder formula, but he must not pass it on, after all, no one can say what kind of character anyone is, so it is better not to talk about it so carefully.

What he had to do was to show the power of gunpowder, so that those students who were a little careful would put out this kind of thought.

Instead of handing over safe formulas, here's where the difference comes in......

College students already have a certain level of knowledge, and at the same time, they also have a certain ability to distinguish, even if they tell him the formula, they can't mess around with this thing casually, but high school students are different.

The blood is strong, the blood has not been extinguished, anything can be done, you may be beaten today, and you will dare to take this thing out tomorrow.

"Okay, classmate Zhang, turn around, what you have to do now is to put the charcoal in it first, and then ......"

The safety teacher pointed to several materials that had been prepared on the stage, and then instructed Zhang Deshi to put them in little by little, and slowly said: "If the first material is put in, there will be no accidents, and the most likely thing to cause an accident is this fourth process." ”

"You're watching!"

Speaking of this, he asked Zhang Deshi to slowly pour the last ingredient into a cup, and then, he quickly ran to the side, and said to Zhang Deshi, who was still stunned on the stage: "Run!" Squat down and cover your head! ”

Although Zhang Deshi was enlightened, he was very clever, so after hearing it, he immediately ran to the door of the classroom, hugged his head and squatted down, and it was at this time.

Bang!

The bottle was blown to pieces, but thankfully, it wasn't a glass bottle, otherwise the power alone would have been overwhelming.

Soft plastic bottles!

Even if it's torn apart, flying out won't make people feel too uncomfortable.

"Hold the grass!"

Zhang Deshi couldn't help but curse a foul word, and at this time, when he looked at the students hiding behind him, what he felt was the coldness all over his body, especially looking at Fang Mo's cold gaze with a slight smile, and he almost didn't directly raise the knife to cut it.

No wonder, no wonder those classmates ran far away, and even Fang Mo, a madman, was a little scared.

He finally understood!

This experiment will kill people!

But in an instant, there was a heat in his eyes, because just now he thought about it in his heart for a while, and suddenly felt that many of the divine skills recorded in ancient Taoism were very likely to be generated by chemistry, and this teacher ......

You can take him to open the door to a new world!

Zhang Deshi, don't be afraid, he began to tremble with excitement at this time, he suddenly felt that he could reproduce a lot of things, especially some Taoist techniques recorded in ancient books, and even in the entire history, only one or two people practiced them!

Those sources, he seemed to have seen in this experiment!