For a while, the whole classroom exploded.

"Just kidding, huh? How is it possible to produce more than 1,000 chemical reactions? This answer is too outrageous! ”

"Yes, Li Dan has no technical content at all this time!"

"I've just seen less than 100 chemical reactions, and I've pretty much seen them! There can't be 1,000 species! ”

……

In the midst of doubts, Li Dan smiled slightly awkwardly, and then sat back in his seat and said no more.

Chen Min watched Li Dan's series of reactions and actions, and then looked back at the chemical reaction on the blackboard, and the expression on his face became more and more solemn.

"Sure enough, science fiction is actually what happens in reality...... Is the truth in the hands of a few or in the hands of the many......"

At this time, Wang Jianguo stretched out his hands and signaled everyone to be quiet, and then asked Li Dan with a smile: "Classmate Li Dan, why do you say that there are more than a thousand chemical reactions?" There are not a thousand chemical reactions learned in our high school textbooks combined, huh? ”

Li Dan smiled awkwardly: "Maybe I'm thinking too much...... I expanded the compounds, decompositions, displacements, and metametabolics produced by each chemical reaction into the sample substance. In this case, the 42 chemicals theoretically produce a total of 286 different chemicals, which can then be expanded to the sample substance...... In the end, a total of 1,247 chemical reactions were calculated. ”

After saying this, the classroom became silent.

Because, almost all of them only take into account the chemical reactions that can occur between these 42 chemicals that are present on the blackboard.

It does not take into account that the new substances produced after the first round of chemical reactions also need to be expanded into the sample substances to continue to participate in the second round of chemical reactions.

Not to mention the third round, the fourth round...... Until the range and variety of sample substances can no longer be expanded!

Wang Jianguo sighed lightly.

"In the high school exam, there should be 93 correct answers to this question.

However, if this restriction is removed, the chemical reactions that theoretically may occur will be far more than these, and even more than the 1247 kinds calculated by Li Dan!

For example, many chemical reactions in different temperature ranges, different pressure ranges, completely different changes and new chemical species are produced.

For example, in some extreme environments, such as ultra-high temperature, ultra-low temperature, strong radiation, etc., there will be magical reactions between substances that would not otherwise undergo chemical reactions......"

The whole class, including Li Dan, was completely shocked by the words of chemistry teacher Wang Jianguo, as if they had suddenly opened a window in their narrow cognition of the past and were able to peek into the vast new world of the outside world.

At this moment, everyone no longer simply thinks that chemistry is a basic discipline that is partial to memory.

I take it for granted that as long as I memorize the chemical equations, chemical reaction formulas, and the periodic table, I dare to pat my chest and say that I have learned chemistry in place!

The chemistry knowledge learned in high school is not even scratching the surface compared to this subject!

However, in order to prepare for the college entrance examination, the vast majority of students poured all their lifelong passion for chemistry into the endless sea of questions in the third year of high school.

Once the college entrance examination is over, students tear their books, review materials, and exercise books to shreds, and they are likely to lose their chemistry in this life!

"The reason why I will come up with this question in class to test you is to make a special note on the multiple-choice question 13 of this month's comprehensive examination paper.

There are 10 chemical substances listed in the stem, and how many different chemical reactions are produced in total.

Although there are 21 types of correct answers, this is based on the limitations of chemistry knowledge learned in high school.

Regardless of the associated limitations, I personally think that the correct answer should be option D, with more than 30 options. ”

When Wang Jianguo said this, he smiled at Li Dan, who was sitting in the back row of the classroom, and nodded.

Li Dan suddenly realized that his question was the D option he chose, and according to the standard answer, he should have chosen the wrong one.

The chemistry teacher wants to make a vivid demonstration for the whole class through the question in the class just now, and carefully nurture each student's enthusiasm and interest in chemistry.

Mr. Wang did not tell the students bluntly that the correct answer to the test question should be C, and the choice of D is wrong!

Although this practice helps students not to think too much about the college entrance examination and make the wrong questions and choose the wrong answers, it also ruins the students' curiosity and enthusiasm for chemistry!

Needless to say, the credit for exam-oriented education is self-evident, but in recent years, the disadvantages have become more and more apparent.

Originally, it was a high school stage that focused on basic education, but because of a large number of mechanical repetitive questions every day, almost all of the students' enthusiasm and interest in learning were exhausted.

Even some high school teachers misguide the students in their classes.

"Don't be afraid of hard work, the high school stage is tight, and when you go to college, you will be relieved ......"

"As long as you can get into a good university, you don't have to work as hard as you do now, you can play as much as you want......"

Therefore, as soon as many high school students enter college, the nerves that have been tense for a long time are immediately relaxed, and the whole person is relieved.

Falling in love, playing games, skipping class, clubbing......

The golden four years of college, which should have been a crucial time for everyone to climb academic peaks, were wasted by many people in a mess.

Coupled with the strict policy of entry and wide exit of undergraduate universities, as long as you don't play too much and are too outrageous during the university, you can basically get an undergraduate diploma and a bachelor's degree.

However, when college graduates hold the precious diploma that they spent more than ten years of their youth to obtain, they suddenly find that their heads are empty, and they have neither learned advanced professional knowledge nor mastered the corresponding professional skills, the whole person is dumbfounded.

Where is this TM going to college for four years?

It's clear that Lao Tzu was given by the university?!

However, most people don't think that it should be high school that causes them to lose enthusiasm and interest in learning!

Especially during the period of preparing for the college entrance examination in the third year of high school!

"Children, I have spent most of my class today talking to you about this question, which has taken up so much of your precious time.

However, I feel like I should do it and I have to!

The college entrance examination is important, but it is not the only important thing in a long life!

I want you to remember that life is not a 100-meter race, but a marathon!

Even if you are a big step ahead of others at the beginning, as long as you can study persistently for a long time, you will definitely be able to make up for the gap and even surpass the other party!

Speaking of which, I would like to make a special commendation for Li Dan from our class!

He is a model of perseverance in learning, and he has achieved remarkable results in this monthly exam! ”