Live broadcast: Ancient people accompany me to make up lessons

Everyone watched as the anchor took out another set of papers with the word "mathematics" written on them.

Like the previous geography, the first section is also a multiple-choice question.

Many people who were confident that they were good at arithmetic were gearing up to answer questions with the anchor, only to be knocked down at the first question.

[Known set A=……]

Zhang Cang put down his pen and began to doubt his eyes. What do these symbols mean?

Even if the system thoughtfully provides explanations behind the symbols, few people can look at the rigorous and professional sentences without getting dizzy.

Kangxi looked at his sons: "Have you guys forgotten what you should have learned?"

Children below: Old man, why are you so crazy? Did we learn this at the time?

Fortunately, the anchor was also very hesitant. He watched her pen write and draw on it, and finally chose a C. Everyone was looking forward to the next question.

[A necessary and sufficient condition for a>b is ( )]

Many people who think they have been smart enough since childhood have their eyes wide open and begin to doubt and think about what all this is.

Of course, there are not many people who have a certain mathematical foundation, can quickly understand the symbolic explanations given by the system, and follow the host's calculation draft, but there are only a few.

Because it was more dizzying knowledge than that of astronomy and geography, even though they couldn't understand it, it didn't stop them from feeling it was powerful. Many people insisted on recording and copying it down.

Vectors, vertex origins, counterclockwise rotations, non-negative semi-axes... This paper is really more dizzying for most people except for math enthusiasts and a few geniuses than reading a book from heaven.

The Bible can also be appreciated. For mathematics, they can't even appreciate the anchor's words. They have a headache when they see those numbers and symbols.

Finally, among a bunch of questions that they couldn't understand, they also saw a question that they could finally understand.

[The ancient Chinese mathematics work "Nine Chapters on Arithmetic" is the earliest pinnacle book of applied mathematics in the history of human science. It records such a question: "Today there is a woman who is good at weaving. The day is multiplied. If we weave five feet in five days, what is the geometry of the day's weaving?"

The translation is "Today there is a woman who is very good at weaving, and her growth doubles every day. She weaves a total of 5 feet in 5 days. How many feet of cloth are weaved each day? Then the woman weaves the next day ()]

Finally, there is a question that can be understood and understood. Many people are relieved. Moreover, "Nine Chapters of Arithmetic" was written very early, and even everyone in the Qin and Han Dynasties has read it.

With a look from Ying Zheng, Lang Guan next to him immediately arranged for someone to go down and look for books.

Zhang Cang came up with the answer easily, then looked at the straightforward and simple numerical symbols on the anchor's test paper, and then looked at the words he wrote in small seal script. By comparison, he suddenly understood the importance of these symbols.

Liu Che also asked people to find books, but he was still confused: "Does this need to be translated again?"

Liu Bei's eyes fell, and Liu Chan, who didn't know how to do questions and copy them, immediately continued copying.

Liu Bei didn't want to look at him: "Kong Ming, is it possible that future generations can't even read the books of the sages?"

Zhuge Liang thought for a while and thought: "Your Majesty, they have too much to learn. They must really not have time to study these books."

"How can you learn such difficult mathematics and not understand such a sentence?" Li Shimin didn't understand and was shocked.

What kind of methods do people in later generations have? They are so powerful. They will pull out ancient books from time to time even when taking exams. They know how to write questions, and a sentence still needs to be translated so clearly.

When Kangxi saw how simple the question was, he immediately asked: "How many did you choose?"

Sons who have grown up and still need to be tested:...

Why don't you go to Xian'an Palace and stay with your second brother?

[Quzhi School carried out a theme activity of learning from Lei Feng in March. 5 girls and 2 boys in a certain class were divided into two groups to participate in volunteer activities in two places. Each group was required to have both girls and boys, so different There are () types of distribution plans. ]

It was another understandable question, and many people had already started counting with their fingers, and their quick minds had already figured out the answer.

Zhang Heng also quickly calculated the answer, then watched the anchor's steps to solve the problem and wrote it down in detail.

And some people have noticed the situation in question.

"Is it possible that in future generations, boys and girls will go to school in the same class?"

The children stopped playing and looked at the sky together, wondering what the school, classes, and groups were. Is it a place where people learn, like the school in the town?

The old man who knew a little bit of reading stroked his beard and patted the children on the head: "You don't have to work anymore, just look good. This is to teach us to read..."

At the end of the multiple-choice questions, there will be more people who can’t understand the fill-in-the-blank questions and answer questions. There is no answer yet. It’s basically the same as when the anchor was talking about the formulas of physics and celestial bodies. Except for geniuses and those who understand, everyone is copying like crazy because I really can’t understand the triangular pyramid and the like. These questions are too weird.

Li Shimin, who had given up on solving the problem early, was approving the memorial and hoping that his sons would be successful. At the same time, he was waiting for time to pass. He really felt that the word "mathematics" was overshadowed.

How could there be such terrible knowledge in the world!

Fortunately, the anchor wrote very quickly, and she left blanks when she didn't know how to do it. She didn't waste any extra thinking time and started to answer the questions. Everyone paid close attention to the answers and wrote them down.

There are detailed answers with results and steps. Quickly write them down. If you don’t understand, let the family members figure it out. Even if it doesn’t work, you can pass it on to the family or sell it. It will always be a good idea.

Then there was a ding, and an hour passed.

[Xiao Xiao put down his pen and stretched, his head was dizzy from the torture of mathematics.

"The time is up, let's start drawing lucky viewers."]

Everyone who was waiting for this sentence was refreshed: It's finally here!

Being drawn to the sky is not only a chance to gain knowledge given by the anchor, but also proves that they are far luckier than others. It is also an opportunity for them to become famous all over the world and even change their destiny.

A few seconds later, a fresh list of lucky viewers appeared.

[1. Qin: Dong Wu

2.Han: Xu You

3. Chinese: Zhang Qi

4.Chinese: Yiyi

5. Tang: Yan Zhending

6. Tang Dynasty: Di Rong

7. Zhou: Shangguan Waner

8.Song: Su Shi

9. Ming Dynasty: Song Ziwen

10: Clear: Li Wei]

Those who saw their names were ecstatic, while those who didn't saw them were disappointed again.

But why did the Tang Dynasty have two of them? Don’t you think it’s too much? Also, your Song Dynasty has already had Shen Kuo on the list twice, why is Su Shi here again this time?

Song Chao: We are also very upset, ah no, we are just curious, why do they come in turns, Tianmu, look at us!

[Xiao Xiao put away the test papers, went to the kitchen with a cane, and made himself a cup of coffee.

"Lucky Audience No. 1, please speak."]

The young disciple who followed his master to work in the fields widened his eyes and realized that he was on the list. Children of several years old also saw the anchor soaking like this yesterday, and the powder instantly turned into black water.

He asked curiously: "Anchor, why can you pour hot water from your pot? Are you taking medicine because your leg is injured? Can you add sugar and milk to the medicine?"

[Xiao Xiao glanced at the coffee packaging bag that he had not thrown away, and couldn't laugh or cry: "This is not medicine, it's called coffee. You can drink the soy milk made by grinding soybeans and water. This coffee is just like soy milk."

Feeling that the soy milk analogy was inappropriate, Xiaoxiao picked up the tea can next to her and said it another way: "It's the same as tea, it has the steps of roasting and even fermentation, and it contains caffeine. People who stay up late and work overtime usually Drink strong tea or coffee to relieve fatigue."

"Milk and sugar are added because coffee is more bitter than tea. It all depends on everyone's preference. Some people also add sugar and milk to make milk tea when drinking tea."]

Looking at the white porcelain jar opened, the tea leaves curled up inside were sitting quietly, it was very beautiful.

In those dynasties when tea was cooked with green onion, ginger, and pepper, there was no pressure to add sugar and milk. Even many wealthy people wanted to try it.

Zhu Di, the prince of the Hongwu Dynasty, muttered: "Isn't that how the Mongols eat?"

Zhu Yuanzhang, who also liked this kind of loose tea, slapped his fourth son: "Shut up, fourth son!"

Mongolian or not, you have so much control over how people drink, yet you still insist on telling them. He was a descendant of Wuhou, his surname was Zhuge, and he was from Mongolia.

However, this kind of loose tea is indeed beautiful, and there is no need to specially make it into group tea. It seems to save people's labor.

[Xiao Xiao mentioned his kettle and explained: "This one can pour hot water because the water has been boiled and placed here before. This is called an insulating kettle. It is made of insulating material with very low thermal conductivity. The hot water When you pour it in, the heat will be lost very slowly, and the mouth of the pot has a sealed lid to prevent cold air from entering from the outside.

This pot of water should have been boiled in the morning, but it is still hot two hours later. This pot in my house is a bit old, and the ones I have now basically keep it warm overnight. ”]

Someone asked in surprise: "Isn't that just because I boil water at night, put the unused water in, and then drink it after I wake up?"

When the people around him heard what he said, they felt as if they were awakening from a dream: "That's right! If you want to drink something hot, you don't have to burn firewood. You can drink something hot at any time in winter."

It’s not that there weren’t some insulation materials in ancient times. Rich families would also have a Jian Fou, which contained wine or food, and hot water or ice cubes in the space between the outer Jian and the inner Fou. However, these things were not accessible to ordinary people. That’s all.

In the Song Dynasty, there were also two-layer vacuum thermos bottles, but the insulation of vacuum ceramic bottles was obviously completely different from that of anchor thermos bottles.

Shen Kuo knew that their principles were the same but their methods were completely different.

Jian Fou requires hot water, so in addition to constantly changing the hot water, you can also put a charcoal basin under it, but it is too luxurious, and no one will boil water just for a sip of plain water.

A thermos can keep you warm, but it will never have such a powerful effect overnight.

The focus is still on the insulation material.

A hot water kettle is just a form, it can be this or other shapes. The focus is on the two functions of insulation and sealing.

If only it could be made into a military kettle...

Thinking of this, Li Shimin sighed with emotion: "Insulation materials, thermal conductivity... a small kettle can also have such great knowledge."

After speaking, he looked at his brother-in-law: "Auxiliary machine, let's see if there are capable people in the Tang Dynasty who can make this hot water kettle for the marching soldiers to use first."

The burning eyes of the generals below who originally looked at their Majesty suddenly shifted to Changsun Wuji.

Changsun Wuji:...

Thank you, you can also find someone to do it yourself.