Chapter 224: My Additional Volume on Arithmetic
What Emperor Uncle Zhu Zaiyu came up with is completely out of line with this era. It is a kind of exploration and innovation, combined with the application of past experience. It is so easy to use. Well, that is, to the extent that it can be used, the efficiency is certainly not comparable to that of later generations of steam turbines. The thermal efficiency of later generations of steam turbines used in large ships and power plants can reach more than 60%, and the turbine of Emperor Uncle Zhu Zaiyu is afraid that It is difficult to achieve even 5%, and it is extremely unstable.
Zhu Yijun can clearly explain the principles, such as high-pressure steam, safety valves, the acceleration principle of stator blades on steam, high temperature, high pressure and high speed, after passing through the rotor blades, it becomes high temperature, high pressure and low speed. The blades cool down and reduce pressure, and the steam expands and then naturally increases the speed of the blades.
But asking Zhu Zaiyu to fully understand the logic and then design it more scientifically would be embarrassing the emperor's uncle.
But it is also a shocking miracle, because the reciprocating steam engine has been used for more than two hundred years. By the time of the triple expansion steam engine, the thermal efficiency was only 8%, and the efficiency of this magical steam turbine has been Close to 5%, which is extremely scary.
When Watt improved the steam engine, it was not a matter of precise calculation and design, but an empiricist practice.
Zhu Zaiyu’s steam engine has short working time and low service life. High-temperature and high-pressure steam is extremely fatal to the damage to the steam turbine. Material science needs breakthroughs to adapt to high pressure and high temperature, often 400° and 500°. High temperature and high pressure steam can cause fragile blades to break easily.
The next day Zhu Yijun received a memorial from his uncle Zhu Zaiyu. How can a short-lived steam engine extend its life? Zhu Zaiyu used a strange idea to reduce the weight of the safety valve on the high-pressure boiler, lower the temperature and pressure, reduce the pressure on the blades, and reduce the high temperature above 400° to below 200°.
Although efficiency will be further sacrificed, the service life can be immediately extended to a point sufficient for practical application.
"Uncle Huang is awesome." Zhu Yijun approved Zhu Zaiyu's memorial. This does not mean that Zhu Zaiyu gave up the exploration of high pressure and high temperature, but that he practiced it and combined theory with practice to let the steam engine practical application.
The principle of a reciprocating steam engine is very simple. Steam is input to push the piston, the piston drives the crank, and the crank drives the flywheel.
The reciprocating steam engine allows high-pressure steam to enter the cylinder from both ends, pushing the piston left and right, and the device that realizes the high-pressure steam entering the cylinder left and right is a slide valve connected to the flywheel.
The slide valve is connected to the flywheel through the slide valve rod. The flywheel rotates, the slide valve moves left and right, and steam enters the cylinder from the left and right sides.
The biggest technical difficulty is sealing. Both the slide valve chamber and the cylinder have connecting rods connected to the flywheel, and both the slide valve chamber and the cylinder require sealing technology.
Compared with steam turbines, the biggest problem of reciprocating steam engines is the difficulty of sealing. It requires the connecting rod to go in and out, and the connecting rod must be sealed to prevent the steam from releasing pressure. This is what Zhu Yijun needs to overcome. Technical difficulties.
Under a heavy reward, there must be a brave man. Various ingenious ideas appeared on Zhu Zaiyu's desk. Any useful opinions will be adopted by Zhu Zaiyu and a reward will be given. Silver, the topic of firepower and water, under the heavy reward, began to rise.
Major newspapers in the capital began to report on the imperial court's heavy reward, and looked for people who could use firepower to lift water.
If you can't burn coal, burn silver. This is Zhu Yijun's solution. Burning silver is really useful, and Zhu will soon gain something.
"Your Majesty, Mr. Yuan Fu said that he is ready, please go." Feng Bao bowed his head and said. The experiment venue was at the Quanchu Guild Hall. Zhu Yijun, who was sorting out agricultural books in Baoqi Division, heard this and closed the farm. Book, stood up.
This device comes from the "Min Bao". It is not a steam engine, but it is also a water collection device.
Minbao, a miscellaneous newspaper that likes to report on various things closely related to the people, reported on an artesian water device. This device is not a perpetual motion machine that does not require work, but a simpler way to obtain water. It is also in response to the imperial court. Calling for attention, this thing aroused heated discussion among the public as soon as it came out.
Zhu Yijun rushed to the Quanchu Guild Hall. Zhang Juzheng was waiting in front of the door, and the thresholds had all been removed. Under the leadership of You Qi, Zhu Yijun came to the pool of Jiuzhe Bridge.
The device is very simple, a bellows and a pipe. The air inlet of the bellows, which originally sucks air, is connected to the pipe and extends into the artificial lake.
You Qi stood next to the bellows. After getting Zhang Juzheng's approval, You Qi began to twitch the handle of the bellows.
“The water is coming out.” Zhu Yijun looked at the air outlet turned into a water pipe and said to Zhang Juzheng with a smile.
You Qi chose to stop, but the water flow did not stop and was still flowing out. Then the water flow became smaller and the water stopped flowing. When You Qi pulled again, the water flowed out again.
At this time, Zhang Juzheng, the chief minister of the Ming Dynasty, was in a daze. The willow trees beside the Jiuzhi Bridge had sprouted, and under the blowing of the spring breeze, ripples were made on the lake. He had tried it many times. , this is not Taoism, but the infinite principle of all things.
It's very simple, the gas in the tube is removed, so the water is sucked up, using atmospheric pressure.
In the Ming Dynasty, there was a kind of wine drinker with a long hollow pole and an air hole on the top of the long rod. Put the wine drinker into the wine and press the air hole to lift the wine up. Then loosen the air hole and the wine will be released. It will flow into the cup, also using atmospheric pressure.
You Qi took the emperor and the first assistant to his own well and extended the pipe into the well. The first well quickly pumped out water, but the second well did not.
"The second water reaches the ground and exceeds three feet. But if it exceeds three feet, the water cannot be pumped out." Zhang Juzheng said.
According to the common understanding of Daming and Taixi, the basic principle of nature's aversion to vacuum should be able to press out water if it exceeds three feet, but if it doesn't work, it won't work.
Atmospheric pressure also has a limit, it can only press water to a height of about three feet.
The depth of three feet is the maximum distance that a water press can reach to pump out water. This does not mean that this device is useless. On the contrary, it is very useful and can greatly facilitate people's lives.
Its application scenario can be used in wells lower than three feet. This is a convenient and magical invention.
The air box is slightly modified to become a water press. It is coated with tung oil and can be used for decades. There is a leather pad cover on the piston and water pipe inside, so the air can only flow from bottom to top. It cannot flow from top to bottom. Of course, if the sealing is poor, you can pour a little water up first to increase the sealing.
"Where is the craftsman who invented this thing?" Zhu Yijun nodded repeatedly after looking at the actual object. It is really an ingenious method of lifting water. Although the height of three feet is limited, it can still be used practically.
Zhang Juzheng was like this. He was afraid that someone would deceive the Holy Emperor, so he tried it himself. After all, during the Jiajing period, there were fake Taoist priests who deceived the Taoist priests, and they were tipped off by Tishuai Lu Bing. His Majesty is young, if he is... Zhang Juzheng, the imperial master, bears the primary responsibility for being deceived.
Zhang Juzheng discovered through practice that this thing is useful and has limited application scenarios, but it is indeed very useful and can greatly facilitate people's lives.
Zhu Yijun couldn't help but smile when he looked at the water press in front of him. Although this thing cannot solve the problem of water lifting in the mine, the bottom layer of the mine is extremely complex, and the water surface height is more than ten meters high. Zhang, so we still have to build a steam engine.
But any good thing for the people is something Zhu Yijun needs to pay attention to.
Zhang Juzheng asked You Qi to bring the craftsmen to His Majesty.
"The common people pay homage to Your Majesty, long live Your Majesty, long live, long live your Majesty." Zhu Yijun looked at the person in front of him. He was a middle-aged man. According to reports from the People's Daily, this man was a carpenter from the outer city named Liu. Three swords, when the imperial court issued an order to find a plan to pump water with firepower, he thought about it. Since the bellows can pump air, can it also pump water?
This attempt really worked, but he didn’t know who to talk to about it, so he found the People’s Daily.
"No gift, no gift, you failed to solve the problem. I can't get the five hundred thousand taels, but I will give you a third-class merit medal, a thousand taels of silver, and a bottle of national cellar. I will give you a piece of worsted wool as a special gift." Zhu Yijun asked Feng Bao to take out his reward.
The third-class merit medal is made of copper, and the reward of one thousand taels of silver is enough for Liu Sandao to change his class.
"The common people thank the emperor for his kindness." Liu Sandao was overjoyed. It was just a simple thought. It was an unexpected surprise for him to receive such a reward. In the future, he would brag to his sons and grandsons. Liu Sandao , is also someone who has met the emperor.
As long as Liu Sandao placed the merit reward card at home, no Youzhui in the city would dare to come and cause trouble. He took the merit reward card and ran to the Shuntian Mansion Yamen, saying that he had made meritorious services for the Ming Dynasty. Shuntian Mansion The Yamen had to treat it with caution, because this Liu Sandao had really met the emperor.
Zhu Yijun chatted with Liu Sandao for a long time, asking him about the situation at home, how many people there were, how old the children were, how he came up with the idea of absorbing water, how he found the People's Daily, etc., until Liu Sandao left. Zhu Yijun, still smiling all over his face, said to Zhang Juzheng: "Who is writing the Minbao?"
There is a key platform for speaking out here, the Minbao.
Zhu Yijun likes to read the People's Daily, which is about things that are closely related to the people. There are many interesting stories in it. This People's Daily does not have any partisan elements. Zhu Yijun is very curious about who is running this newspaper.
Miscellaneous newspapers can be described as a mixed bag, with each writer publishing various strange editorials with their own thoughts. It can be described as a chaotic dance of demons. However, this civilian newspaper never involves government affairs and specializes in picking out interesting things for publication. .
When Liu Sandao found the Minbao, the Minbao did not take credit, but reported the truth, which is commendable.
"Jiao Hong and his teacher Geng Dingxiang organized the institute." Zhang Juzheng bowed his head and said. Miscellaneous newspapers are an important means of arousing noise and public opinion. Zhang Juzheng must pay close attention to who is behind them. They have already Clear as day.
This civilian newspaper was organized by Geng Dingxiang and Jiao Hong.
"Is this Jiao Hong who offended Sun Jigao last time in Yanxing Tower and almost failed to register for the examination?" Zhu Yijun was deeply impressed by Jiao Hong. This student had a verbal battle with the Confucian scholars in Nanjing Chongzheng Academy, and when he arrived The capital went even further and scolded Sun Jigao directly.
Sun Jigao, the number one scholar, is always scolded.
"Exactly." Zhang Juzheng replied.
If you enter, you will be helpless, and if you leave, you will be invincible. The country will always perish. People are like this, their families are like this, and the country is like this. They were born in sorrow and died in happiness. Zhang Juzheng was very happy to see the people's newspaper. , seeing Jiao Hong, seeing the standards followed by the people's newspapers, the first thing to do is to be faithful and report the news according to the truth.
This is really rare.
Sun Jigao, as the number one scholar with a criminal record, had a wide network of contacts in the scholarly community. If Jiao Hong offended the abbot, he would definitely not be able to worship the Buddha.
But Jiao Hong is now a disciple of the Quanchu Guild Hall, so naturally no one dares to embarrass him too much.
"Sun Jigao didn't prepare a miscellaneous report?" Zhu Yijun asked curiously.
"It's done." Zhang Juzheng said without saying a word. As the ancient tomb sect of the retro sect, how could Sun Jigao not publish miscellaneous newspapers?
"How did it go?" Zhu Yijun asked Sun Jigao for his miscellaneous reports while walking towards the Jiuzhan Bridge.
“We were unable to make ends meet, so we announced our closure in December last year. Their retro style was actually widely popular in Shilin, but it was somewhat boring and few people bought it. They will lose money if they only rely on their own people."
"This matter has something to do with worsted wool." Zhang Juzheng explained the logic.
In fact, Sun Jigao's miscellaneous newspapers could have continued to be maintained, as long as the powerful rightists behind Sun Jigao kept giving money. However, recently, the focus of the powerful rightists has been on worsted spinning. Damn it, Sun Jigao was naturally out of business and had no choice but to stop.
"The dog food is out?" Zhu Yijun asked after thinking for a moment.
Zhang Juzheng said with a smile: "The dog food is gone."
This was the second time that the term dog food appeared. The first time was when talking about the Imperial College's opposition to arithmetic. Zhang Juzheng was no longer surprised by His Majesty's precise and interesting vocabulary.
"It's a good thing he didn't fart, otherwise I would have taken his dog head myself." Zhu Yijun shook his sleeves. There are some bottom lines in the Ming Dynasty that cannot be touched. If Sun Jigao makes up a rhetoric similar to that Japanese pirates are also human beings, Then Zhu Yijun could only clean up the moths himself.
Zhang Juzheng looked at His Majesty's back and shook his head. Your Majesty was not joking, he could really do it. He was slightly distracted, thinking about the issues after returning to power.
His Majesty is already fifteen years old, and will be at the age of pro-government when he gets married next year. He has seriously considered the issue of retirement, but it seems that he cannot do so.
It’s not that he wants to be regent, but that the Ming Dynasty still needs him.
What will His Majesty do after taking office?
There will be a big cleaning.
This is what Zhang Juzheng could have expected. His Majesty's determination to inspire the Ming Dynasty is far greater than he imagined!
His Majesty’s stinginess was only for extravagance. When it was time to take action, he rewarded five hundred thousand taels of silver to the craftsmen to improve their craftsmanship. When Zhu Zaiyu didn’t want it, the emperor chose to increase the money. The five hundred thousand taels of silver reward was still No change, I chose to give Zhu Zaiyu a bonus, and the 500,000 real money still had to be spent.
This is just a small matter. After His Majesty takes office, he will definitely launch a round of bloody purges against the retro-religious faction, especially the Tomb faction, who oppose the New Deal. There is no doubt that the result of anyone who blocks the New Deal will be death in the physical sense. .
This is His Majesty's determination. Chen Youren, a man who talked nonsense, slandered the Ming Dynasty Jingying and slandered Qi Jiguang, the emperor chose to kill people himself. This was the choice of the Ming Emperor.
So Zhang Juzheng cannot retreat. If he retreats, the world will enter a high-pressure state.
Just like people need to get a haircut or trim their nails, a large and bloated personnel structure will inevitably selectively optimize some parts. However, in the process of optimization, you can never have your feet hurt, your feet hurt, or your hands hurt. Cut off your hands, if your head hurts, cut off your head.
Tan Lun's radicalism is like cutting off his head due to pain in his head, and His Majesty's radicalization can easily turn into a pain in his hand and cutting off his hand due to the development of the situation.
Once some things start, they will not be controlled by anyone, not even the emperor, and eventually lead to a catastrophic disaster that affects the entire Ming Dynasty.
Zhang Juzheng was very melancholy, and his beautiful retirement life was drifting away.
Zhu Yijun had another meal at the imperial master's house and talked in detail about the imperial examination. Candidates for the imperial examination held every three years in the Ming Dynasty will soon be admitted to the hospital. This is to select talents.
"Sir, would you like to add an additional paper on arithmetic? How good or bad the exam is will not affect the title on the gold list. It can be considered a try." Zhu Yijun said tentatively. The quality of arithmetic can be used to judge a person. With his logical thinking, Zhu Yijun planned to find some capable people. Farming, coal mining, clearing the land, returning the land, collecting taxes, etc. all required arithmetic talents.
"I think it is good." Zhang Juzheng shook out a math test paper from his sleeves. He was actually hesitant, but since His Majesty said it, he would just add it to the examination. alright.
There are a total of twelve questions, sixty points, one question is worth five points, and points are given according to the steps.
The additional volume does not affect the title on the gold list, but it affects the student's image in the emperor's mind, the emperor's attention and respect. For a minister, it is a step to the sky.
For the Jinshi, the imperial examination is not the end, but the beginning.
Zhu Yijun asked Zhang Hong to bring over a set of additional papers and said with a smile: "I also have one, sir, can you take a look?"
Zhu Yijun was reviewing the test papers issued by Zhang Juzheng, and Zhang Juzheng was reading the emperor Exam papers issued.
"Your Majesty, this is too difficult." Zhang Juzheng read a few questions and immediately took a breath of air, which relieved the small glacier climate of the Ming Dynasty. The emperor was too radical. Your Majesty's set of papers appeared in the examination room. Go up, even if it is not four thousand people, three thousand five hundred people will get zero points.
“Isn’t this very simple?” Zhu Yijun said very confidently: “It is at the level of Biantongtang. There are at most two questions at the level of Minglitang. Why is it difficult?”
"Sir, this set of questions is really too simple. Even a kid like me can do it. If you use it to test people, isn't this a disgraceful way of judging people who don't read arithmetic?"
Zhang Juzheng understands, and His Majesty knows it completely. The difficulty of his test paper was just to embarrass others. His Majesty's ability in humiliating people was highly recognized by Zhang Juzheng. In the future, Qing History concluded that in the fifth year of Wanli, most of the students scored zero in arithmetic and would be laughed at for thousands of years. .
"I thought I would use my method." Looking at Zhang Juzheng's expression, Zhu Yijun knew that Mr. Zhang had understood his purpose, so he didn't hide it anymore, he just made it clear that he wanted to humiliate the humble Confucian. , didn’t you want to disobey the imperial decree and refuse to learn arithmetic? Either don't take part in the imperial examination and don't have ambitions for power, or else obey the imperial decree and implement it conscientiously.
This is Zhu Yijun's purpose.
"Your Majesty is wise." Zhang Juzheng chose to agree. The difficulty of the exam does not matter. It can select a group of ministers who follow the imperial decrees. And because it does not affect the titles on the gold list, even if the educational resources are poor, they can only study Students who have studied the Four Books and Five Classics can also have a fairer examination environment.
Zhu Yijun left the Quanchu Guild Hall with a full meal and a satisfied mood, and continued to tinker with his reciprocating steam engine.
Before the test, Zhu Yijun tinkered with a strange machine, a heat engine, or a Stirling engine.
It has two cylinders in total, one is the hot chamber and the other end is the cold chamber.
Zhu Yijun lit the oil lamp, and the hot cavity began to heat up. The air in the hot cavity expanded and pushed the piston. The piston pushed the connecting rod to rotate. When the connecting rod rotated, it drove the piston in the cold cavity to compress, pushing the cooled air into the hot cavity. In the cavity, this cycle repeats.
The structure of this thing is extremely simple, and the cold cavity is water-cooled by soaking it in water.
When the temperature difference between the hot cavity and the cold cavity is higher, the speed is faster. Bingzhan Bureau also specially uses a hollow design. The cylinder at the cold end is irregular and cast by the lost wax method. There are There are many holes through which water can enter and exit, specifically used to cool the cold cavity temperature.
The heater started spinning, and it was spinning very fast, but it was still impractical, just a toy.
If you want to apply heat engines in the engineering field, it is better to wait for the steam turbine invented by Zhu Zaiyu for reliable engineering applications. Although Zhu Zaiyu’s steam turbine has various shortcomings, it is still better than the one invented by Zhu Yijun. This heater is much easier to use.
The sealing requirements of hot gas engines are much higher than those of reciprocating steam engines and steam turbines. Otherwise, the gas responsible for the work will gradually be lost during the heating process and eventually shut down.
Sealing and lubrication are a pair of contradictions. If you emphasize sealing, you cannot emphasize lubrication. If you emphasize lubrication, you can emphasize sealing. However, a hot air machine must emphasize both sealing and lubrication. This results in a hot air machine. Difficult to apply.
Zhu Yijun put out the oil lamp and continued to study his reciprocating steam engine.
Zhu Yijun was tinkering with the reciprocating steam engine, while Wang Qian, Zhang Siwen, Jiao Hong, Gu Xiancheng and others came to the gate of Gongyuan and entered the Gongyuan to prepare for the exam. They were full of confidence.
When the New Year was approaching last year, Shuntian Mansion would become lively. In addition to the festivities of the New Year, students who came to Beijing to take the exams gradually arrived in Beijing to participate in the Wanli Five Year Examination. On the Lantern Festival, All the candidates who took the exam have already entered Beijing, and they will basically go outside the Meridian Gate to see the lights of Aoshan.
The five directions of the capital gather together, and each township has its own guild hall.
Except for the big families who have houses in Beijing, students who come to Beijing to take the exam will live in guild halls, because during this period, the prices of inns will increase significantly, and the imperial court does not have official residences. Merchants began to prepare for the establishment of various guild halls, and the Quan Chu, Quan Shan, and Quan Zhejiang guilds came into being. It became a matter of course for fellow villagers to form parties based on regions.
It is very busy for people to move to Beijing. They have to visit relatives and friends, submit famous invitations to visit famous people, and participate in various poetry gatherings. If they are Chinese-style, they are classmates. If they are under the same teacher, they are Being the same teacher, this is an unavoidable human relationship.
Some candidates even took the letters of local teachers and found celebrities and elegant scholars in the court to join them. This kind of surrender was beneficial to both parties. Celebrities and scholars win over cronies, and this judicial scholar, under the guidance of celebrities and distinguished people, , it is easier to get a title on the gold list.
On the seventh day of February, the Emperor of the Ming Dynasty decreed the appointment of chief examiners. This year’s presidents are Lu Tiaoyang and Shen Shixing, and eighteen fellow examiners were appointed. These eighteen fellow examiners will be the ones who will grade the examination papers. If they can If you submit your application under the name of the same examiner, you will have a slight advantage.
This advantage is the public opinion of the examiners. For example, most of the examiners this year are Jinshi in the fifth year of Longqing. They are all disciples of Zhang Juzheng. If the positive role of powerful people is discussed in great detail on the examination paper, it will be easy to be dismissed. He was deposed, but if he grasped the wind and public opinion, he could grasp the direction of the exam.
On the eighth day of February, I started to enter the Gongyuan Academy. On the morning of the ninth day of February, I took the first exam, three essays with four scripts and four essays with five scriptures;
On the 12th day of February, The second part of the test consists of arguments, edicts, imperial edicts, and judgments. The annotation is to discuss and interpret the topics; the edicts and edicts imitate the words and deeds of the superiors, and write the corresponding Han imperial edicts, Tang imperial edicts, and Song imperial edicts, and the edicts and edicts. The official documents submitted by the subordinates and the comments made;
On February 15th, it was the third test, the policy question, which was to do reading comprehension on a piece of material.
The first scene is the most important. There are seven articles in total, all written in eight-legged prose. It is difficult to understand. The reason why it is difficult to understand is that there is no logic. Some words and sentences are used, and it is difficult to accurately grasp their meaning. In the words of Ming Dynasty students, this thing is empty and useless. It has nothing to do with political affairs and is of no use at all.
Before the Chenghua period, the imperial examinations of the Ming Dynasty did not use eight-legged essays. If you look at the examination papers of the number one scholars in the past dynasties, you will find that the articles written by the number one scholars in the early Ming Dynasty were not so obscure. By the time of Chenghua After years, the eight-part essay became a fixed form.
Wang Qian, Zhang Siwen, Jiao Hong, Gu Xiancheng and others handed in the policy questionnaires and thought they had finished the exam, but another paper was issued.
“It’s arithmetic!” Gu Xiancheng looked at the scroll and felt dizzy.
Everyone was guessing that arithmetic would be included in the imperial examination. Unexpectedly, the examination would start directly in the fifth year of Wanli without any notice.
Gu Xiancheng just felt dizzy. His arithmetic skills were extremely poor. If he were to take the arithmetic test, he would definitely fail. When he looked at the arithmetic test paper in despair, the line above rekindled Gu Xiancheng's hope. .
Additional arithmetic papers will be announced after passing the examination.
This means that failing to answer the math paper will not affect this year's imperial examination quota. This rekindled Gu Xiancheng's hope. When he started to answer the questions with great interest, he realized that the terrifying nature of these test questions at.
No way.
The three arithmetic schools, Dushu Hall, Bypass Hall, Mingli Hall, and Imperial College, are three-level teaching schools established under the national policy of Bypass Hall. The examination papers are all of the difficulty level of Bypass Hall. Get started.
Gu Xiancheng had never studied arithmetic, so it was strange that he could. He wrote nonsense and handed it in hastily.
Zhang Siwen and Jiao Hong are good friends. Both of them are very enthusiastic about arithmetic and are discussing the solutions to the last two problems. Wang Qian is smiling all over his face. Fortunately, he did not listen to his father and left Huangzhuang by himself. I bought textbooks and learned arithmetic, otherwise I might be embarrassed this time.
It is true that the additional rolls do not affect Jinshi, but the additional rolls affect the emperor's attitude towards the student.
How many Jinshi can only meet the emperor once in their lives during the palace examination. If the emperor is lazy, he may never even see the emperor in his life. At such a critical moment for the sage heart, Wang Qian is very grateful for his Arithmetic is pretty good.
Gu Xiancheng wanted to say hello to Wang Qian, but Wang Qian didn't even look at Gu Xiancheng seriously. He got into his car and left Gongyuan.
Wang Qian opened the car window and watched Zhang Siwen and Jiao Hongmei happily discussing the exam. He sighed heavily and closed the car window.
He was very envious of the friendship between Zhang Siwen and Jiao Hong. Zhang Siwen did not plan to enter politics. After being admitted to the imperial examination, he wanted to enter the Royal Academy of Geosciences, while Jiao Hong wanted to go to the Gouji Institute.
Wang Qian knew that he was a worldly person, so he did not join in the fun.
It is not difficult to run a hot air engine or a Stirling engine, but it is very difficult to control the speed, power, etc. Boiling water converts chemical energy into thermal energy. The medium is water, and the medium of the hot air engine is It is a gas, and it also needs to be converted into heat energy. Please give me a monthly ticket, wow! ! ! ! ! !
(End of this chapter)