"Damn, it's a shame for the almighty traversers......"

Thinking of this, Zhang Ran couldn't help but laugh at himself in his heart.

But fortunately, Mao Ran is a relatively simple guy, he didn't suspect that Zhang Ran said the solution, but he didn't do this kind of problem at all, and directly arranged two apprentices to prepare, trying the possibility of dry steaming and melting explosives that Zhang Ran said, it is estimated that he himself has long been impatient with this dangerous and time-consuming method of taking medicine, but he has not found a solution.

After the arrangement was made, Mao Diamond remembered to ask Zhang Ran about his intentions.

"I asked Deng Gong to give me some mother acid, and try to see if I can try to make a primer!"

Zhang Ran carefully showed a little bit of sulfuric acid in a glass bottle to Mao Drill.

Mao Drill is a typical empiricist, everything he does is completely experimented with experience, and it is simply impossible for him to develop a primer by himself.

This kind of R&D from scratch definitely requires professionals like Deng Fang who are proficient in the principles of chemical reactions, know why and know why.

But Deng Fang is too busy now.

On the one hand, he has to keep an eye on the coking thing in the coking plant, and he also has to keep an eye on the extraction of flue gas to prepare ammonia and sulfuric acid from the sulfuric acid copper smelting furnace.

Zhang Ran now just wants to try to see if he can prepare a primer first.

The reason why Zhang Ran asked for sulfuric acid to come over and prepare for the primer experiment without asking Deng Fang was that Zhang Ran also wanted to prove to Deng Fang that he was not in vain.

Of course, Zhang Ran himself felt quite sure.

It's really because he once saw on the Internet that the Eighth Route Army prepared a primer, as if it was dissolving silver dollars with sulfuric acid, and finally preparing a primer.

"Just dissolve it, it's not difficult!"

Zhang Ran recalled the process and was even more confident.

Although the detachment is running out of money now, a few oceans, which can still be taken out at any time, were brought by Zhang Ran when he came, and he chose a oceans that looked relatively clean and new.

"Go, follow me, today I will open your eyes and stimulate your thinking!"

After saying that, Zhang Ranzhi proudly took a few glass bottles that had been washed and cleaned to hold the medicines bought on the black market, and then took the hair diamond to a small river at the foot of the back mountain.

Historically, the old revolutionary was prepared as a primer by the river, and Zhang Ran wanted to borrow it by the river.

Pour some sulfuric acid into the glass bottle, in order to prevent the explosion, Zhang Ran let Mao Drill use a long pair of pliers to clamp the glass bottle and hover on the water, and then cautiously said to Mao Drill: "Attention, this chemical reaction may explode at any time, once the situation is not right, sink this glass bottle to the bottom of the water to stop the reaction!" ”

Mao Zuan nodded in cold sweat.

Zhang Ran carefully put the silver dollar into the glass bottle, and at that moment, his hands were shaking, and he was extremely nervous.

"Captain, stay away, in case it's really too late to blow up, at least the two of them won't die together......"

Mao Diamond spoke the moment the silver dollar fell into the glass bottle, his face full of the tragic generosity of the hero who was about to be executed.

Although he didn't want to be a deserter, Zhang Ran felt that it was still very reasonable, so the moment the silver dollar fell into the glass bottle, he stared at the reaction in the bottle and quickly retreated......

There was white smoke coming out of it, and there was some smell.

The sulfuric acid in the bottle, which was originally colorless and odorless, also began to change color.

Zhang Ran's heart was raised in his throat, and Mao Ran looked solemn, obviously the same.

A minute passed.

Two minutes passed!

Fifteen minutes passed......

It's just that the silver dollars in the glass bottle are still silver dollars, and the sulfuric acid is still sulfuric acid except for a slight change in color......

Even the white smoke that came out at the beginning is gone!

The death on Mao Drill's face turned into doubt, and he stared back at Zhang Ran.

"Well, it shouldn't be......"

Zhang Ran came over embarrassedly, pinched his chin and looked at the glass bottle that no longer reacted and the silver dollar in it, he was extremely entangled, and said in his heart Shouldn't it be dissolved and crystallized? Or even an exploding one?

What does this mean?

Zhang Ran, who was unwilling, even took out the corrosion-resistant pottery chopsticks specially fired for Deng Fang from the pottery factory and stirred them.

There was a bubble in the sulfuric acid, and one more was missing......

"Our experiment has failed, right?"

At this point, even a fool probably knows that the experiment has failed, not to mention that Mao Drill is not stupid at all, and can even be said to be quite smart.

"It doesn't matter, it's all about crossing the river by feeling the stones, and it's normal for the experiment to fail - failure is the mother of success!" Mao Ran comforted Zhang Ran, who looked embarrassed.

Zhang Ran nodded, and said in his heart, why does this sound so familiar-isn't it often used by Lao Tzu to talk about others!

Foolishly took the silver dollar out of the bottle and washed it in the river water, Zhang Ran found that compared with before, there were more traces of corrosion on the silver dollar, but there was no sign of dissolution.

Obviously, the sulphuric acid did not react with the silver dollar, and the discoloration of the sulfuric acid and the corrosion of the silver dollar were only due to the dissolution of the impurities contained in the silver dollar at the time of minting.

How so?

Zhang Ran was puzzled, and suddenly patted his head and remembered an important detail - it seems that the old revolution in history was an experiment to grind silver dollars into thin slices!

asked Mao Zuan to wait for him by the stream, and Zhang Ran, who did not give up, rushed to the second workshop to find Cheng Dongguo and Cui Sanyuan, and asked them to help crush the silver dollar into thin slices, and then came back to continue the experiment.

But it's still not an egg.

Again, there was nothing more than a little bit of impurity on the silver dollar that had been crushed into a thin slice and there was no more trace of corrosion......

"What went wrong?"

Zhang Ran was puzzled, and he didn't even have the mood to find out if there were any problems in the second workshop of Cheng Dongguo and others, and returned to the branch depressed.

The recruits are still training, and one by one they are being trained by Kang Ting.

The soldiers of the main platoon and the reserve platoon on leave either watched the training of the recruits from the sidelines, or gathered in the built classroom to watch Deng Ying teach the children.

The beautiful name is to learn words and literacy, but in fact, it is estimated that it is more to see Deng Ying, a big beauty.

A group of old men, each of them is simple-minded.

The only difference is that Kang Ting puts his admiration directly on his face and puts it into action, while these guys secretly live their addictions.

"Captain, where have you been for the past half a day!"

Seeing Zhang Ran, he was saying hello to Wang Lao, who didn't know whether to eradicate illiteracy or peeking at Deng Ying's slender figure, and even invited Zhang Ran to listen to the class together, and said with eyebrows: "Teacher Deng's lecture is really good......

Lao Tzu praised you in front of Kang Ting two days ago, and you were an old bachelor for nothing!

Zhang Ran glanced at Wang Laogui, a guy who must not be pure-hearted, but he also glanced at the classroom more.

Deng Ying noticed Zhang Ran, smiled lightly and nodded, but he still continued to teach everyone to read and write, and did not stop lecturing.

At this time, all I learned were traditional Chinese characters, which made Zhang Ran, a guy who was used to simplified Chinese characters, dizzy.

And the teaching method is obviously not creative, just a little, rote memorization!

It was originally a complicated traditional Chinese character, and it was this kind of rigid set of teaching methods without any creativity, for these children who did not have a little foundation, it was indeed too difficult, a pair of eyes full of curiosity, but the expression was bitter like a bitter melon, it is estimated that there is no one for a year and a half, I am afraid it is difficult to have any effect.

"Teacher Deng, come out!"

Zhang Ran thought about it and shouted, he regretted it after calling.

Because the old crutch and others who came to eliminate their illiteracy for themselves all looked at it with admiration, and Kang Ting, who trained the recruits from afar, also looked very hostile.

"Brother Ran, are you okay?"

Deng Ying came out, her pretty face slightly ashamed.

Zhang Ran stubbornly asked: "In addition to such rote memorization, is there any other way that can be used to assist children or villagers in understanding?" ”

Deng Ying didn't expect Zhang Ran to call himself out to discuss the teaching method with him, and he was a little confused: "Isn't that how you recognize words?" Is there any other way? ”

In the end, he even brought a little teacher's tone to educate the general and said: "Brother Ran, I know that you care about the learning progress of the children and villagers, but the matter of literacy can only be done slowly, and there is no shortcut......

Zhang Ran scratched his head with an embarrassed smile and asked Deng Ying to continue to go back to class.

Kang Ting, who was peeking at this side from a distance, suddenly trotted over, and said with a sneering face: "Captain, you have ash on your nose!" ”

Zhang Ran was depressed, and said in his heart, why don't you touch your nose and forget it, I don't have it-Lao Tzu is discussing with Deng Ying the issue of serious cultural knowledge popularization and education, can you not gloat?

Assisted learning, of course, is not only rote memorization.

Pinyin is an excellent way to support learning!

As long as you can speak, plus the auxiliary memory of pinyin, it is of great help to learn words, and it can definitely be described as getting twice the result with half the effort!

In fact, the use of pinyin to assist learning has been practiced since ancient times.

However, this is the use of simpler homophones to learn in a reverse way of cutting, rather than the method of alphabet pinyin commonly used decades later to help learn and recognize words.

Compared with reverse cutting, alphabet pinyin obviously has more advantages and is more regular.

This is also the most scientifically proven auxiliary aspect of learning words!

"If I teach Deng Ying pinyin and let her use pinyin to teach everyone to read and write, it will definitely greatly speed up everyone's learning progress - if you encounter words that can't be written, you can directly replace them with pinyin, wouldn't it be beautiful?"

Zhang Ran thought excitedly, and even thought about simply teaching Deng Ying the simplified characters......

But in the end, Zhang Ran still decided to eat one bite at a time, and first taught Pinyin to Deng Ying.

Thinking that his group of subordinates who couldn't read a basket of big characters learned a lot of Chinese characters in a short period of time because of pinyin, and then they were able to apply these words to combat deployment and message transmission, which had a great effect on the construction of the detachment and even all aspects, Zhang Ran couldn't help but smile again, and the unhappy mood caused by the failure of the mission before was also a lot more refreshing.