Zhao Xiancai's mother is different from his aunt. His aunt often goes out to play mahjong.

Those who stayed in the countryside not only farmed the land to make money to support their families, but also went to work in factories in the towns.

The option of working in a factory has only become available in recent years. When Zhao Xiancai was in elementary school, most people who stayed in the village had only one way to make money: farming, and even if they wanted to work in a factory, they couldn't.

Therefore, many young people go to other places to work to earn money to support their families.

If Zhao Xiancai had not obtained the system and was still addicted to mobile phones all day like he was in the first semester of high school, eating and waiting to die, he might not even be able to pass the bachelor's degree in the end.

In the end, you can either go to a college for three years and then find a class, or you can go out to work directly after graduating from high school.

When adults have no work to do, their pastimes are either watching dramas or playing cards and mahjong, or they can be spectators while others are playing cards.

Zhao Xiancai's mother usually watches dramas at home, and when she goes out, she works in the vegetable garden behind her instead of playing mahjong.

So when Wang Yingxue lived in Zhao Xiancai's house, he didn't need to take special care of her. Anyway, her mother would take care of her.

The day after Zhao Xiancai completed the task of "at the end of this semester, the total score will be the first in the school" was the day the class teacher agreed to get the report card.

On this day, Zhao Xiancai's mother also contacted Fang Qiu and learned about Zhao Xiancai's final exam results.

"The papers that Zhao Xiancai took in this final exam were different from other students in several subjects. Mathematics, physics, chemistry and biology were all papers from this year's college entrance examination.

But even so, his overall score is still the first in the school, and compared with the last monthly exam, his results this time have improved a lot.

I wonder what he has been doing at home recently?"

Fang Qiu on the other end of the phone briefly talked to Zhao Xiancai's mother about Zhao Xiancai's final exam results, and then asked about Zhao Xiancai's recent vacation at home.

"He has been staying in his room all day long during the summer vacation, reading and studying. The school bought him some competition books before, and he also bought some printed materials online."

Zhao Xiancai's mother was also very happy after hearing from the head teacher that her son's grades had improved again.

"Are you reading the competition book?

Well, that's OK.

I'm just worried that he won't feel like he's at school when he's at home during the holidays. He won't have the kind of learning atmosphere and will be just like last semester, thinking about having fun all day long.

Just study.

If Zhao Xiancai's current results can be maintained, even if he doesn't get any ranking in the competition, he will have a good chance of getting into Shuimu University and Beijing University in the final college entrance examination..."

Fang Qiu took advantage of Zhao Xiancai's home to call him this time, and also had a few words with Zhao Xiancai's parents.

There was no way, in Fang Qiu's opinion, Zhao Xiancai was now definitely a promising prospect at Shuimu University and Beijing University. If he went back to the old path of the first semester of high school, then he really didn't know what to say.

After all, Zhao Xiancai worked very hard when he was in junior high school, but after he entered high school, he just thought about having fun, but later he started to work hard to improve himself.

No one can guarantee that Zhao Xiancai will not make the same mistake again, so Fang Qiucai specifically asked about Zhao Xiancai's situation at home.

"...Your teacher said that if your grades can be maintained like this, you can hope to go to Shuimu University and Beijing University during the college entrance examination..."

After hanging up the phone with Zhao Xiancai's class teacher, and waiting for lunch, Zhao Xiancai's mother told Zhao Xiancai about her contact with Fang Qiu today.

This was the only time she could talk to Zhao Xiancai about study matters during the meal, because Zhao Xiancai spent most of the rest of the time studying in his room, and she didn't want to disturb him.

"Brother Xiancai, there are some questions that I don't know about in my summer homework. Can you teach me?" Wang Yingxue also said to Zhao Xiancai at the side.

"Of course it's no problem."

Zhao Xiancai smiled and replied to Wang Yingxue. As for the final exam results and the matters about Shuimu University and Peking University that his mother mentioned, Zhao Xiancai didn't say much.

This horoscope has not yet been written, what can Zhao Xiancai say?

After eating, Zhao Xiancai spent some time giving guidance to Wang Yingxue.

"Two engineering teams A and B jointly build a township road. Team A works first according to a certain work efficiency. After a period of time, Team B joins the construction from the other end according to a certain work efficiency. On the way, Team B encounters a hillside section and the work

The efficiency is low. When Team B completes the hillside section, the road construction is completed. At this time, Team A has worked for 60 days. Suppose the length of the road built by Team A and Team B is y (meters), and the working time of Team A is x days,

The graph of the function between y and x is as shown in the figure.

(1) Seek the work efficiency of Team A;

(2) Find the functional relationship between y and x when Team B is constructing the hillside section;

(3) Find the total length of this township road."

After reading the question, Zhao Xiancai looked at Wang Yingxue's own answer process below.

This first question is very simple. According to the function image, the work efficiency of Team A can be calculated through readings. Wang Yingxue has indeed calculated it.

However, Wang Yingxue's answer process was very short, and there was a large blank space below. From the second question on, she became silent.

"Look, this second question is about finding the functional relationship between y and x, right?

This problem can be solved directly using the undetermined coefficient method. Do you know what the undetermined coefficient method is?"

Zhao Xiancai looked at Wang Yingxue again and patiently explained to her.

"I don't know." Wang Yingxue shook her head.

Zhao Xiancai: "..."

"Well... to put it simply, the undetermined coefficient method is... do you know what the coefficients in the function are?"

Zhao Xiancai was almost at a loss for words when Wang Yingxue said "I don't know", but he soon asked her again.

"I know, it's the one next to x."

"Yes, when we don't know the specific number, we always use k to represent it, right?

The so-called undetermined coefficient method is to use a system of equations to find out other unknown numbers including k, but except x and y..."

After telling Wang Yingxue, Zhao Xiancai also breathed a sigh of relief.

I have to say that sometimes it’s hard to teach people, especially to children like this.

If Zhao Xiancai did the questions asked by Wang Yingxue by himself, he would probably be able to finish them all in a few minutes.

But it took Wang Yingxue more than thirty minutes to explain these questions.

He didn't know that his cousin really understood it and could do it by himself next time he encountered a similar question.

I still pretend to understand, and I still won’t know when I encounter a similar question next time.

"Looking at it now, although Yu Shujun's understanding ability is worse than that of Cheng Zhijun and Wang Yisong, it is much better than my cousin."

Zhao Xiancai thought of Yu Shujun again. He had taught the topic to Cheng Zhijun, Wang Yisong, Zhou Yizhi, Yu Shujun, Li Wanjun, and Jiang Linling in school.

Now think about it carefully, although Yu Shujun had the worst grades among these people at the beginning, her ability to absorb Zhao Xiancai's lectures was no worse than the others except Cheng Zhijun and Wang Yisong.
Chapter completed!