A good wife should raise her from an early age

Opposite is the passenger station of City D, Lin Haoxi took Song Yuhui across the road, entered the passenger station and lined up to buy tickets.Song Yuhui, who was at the back, asked, "Brother, where shall we go?"

"Go to City G, I'll take you around."

After buying a ticket for 10:30, Lin Haoxi was taking him to the waiting area. Song Yuhui remembered that Lin Haoxi hadn't had breakfast yet, "Brother, wait a minute, I'll buy you breakfast."

Lin Haoxi watched him run towards the KFC at the passenger terminal, so he followed him.Song Yuhui looked at the menu at the front desk and saw advertisements on TV, but he didn't expect it to be so expensive, a hamburger cost more than ten yuan.

If you eat it yourself, you will definitely be reluctant to spend money, but if you buy it for Lin Haoxi, you will readily tell the waiter at the front desk: "Hello, I want a chicken drumstick and a glass of Coke."

"Okay, please wait a moment." The waiter said.

"Wait a minute." Lin Haoxi called the waiter to stop, pointing to the menu on the stage, "I don't want that just now, give me a set meal for two."

"Okay." The waiter clicked on the keyboard, "Hello, the total is 63 yuan."

Song Yuhui immediately took out his pocket and took out a handful of loose change. Lin Haoxi had already handed over a 100 yuan note, and said to him: "You keep your money, I want to take you out to play, and I will pay for everything today. "

Song Yuhui was still embarrassed, "But I always ask you to give me money, and I feel really sorry."

Lin Haoxi bent his index finger and flicked on his forehead, "Silly, why are you being polite to your brother?"

The waiter handed out the change with both hands, "Hello, 37 yuan for you."

Lin Haoxi took it and put it in his pocket, and said to Song Yuhui, "Go find a seat and sit down, I'll go over later."

Song Yuhui responded, turned around and went to the dining area to find a seat.At this time, there were not many KFC eaters, so Song Yuhui chose a seat by the window to sit down.

Not long after, Lin Haoxi came over with a dinner plate.This is a set meal for two, two burgers, two Cokes, two red bean pies, one fried chicken wing, and two French fries.

Song Yuhui looked at the plate full of things, "Brother, I seem to have ordered too much."

Lin Haoxi picked up a hamburger, opened it and handed it to him, "Eat as much as you can, and if you can't finish it, you'll eat it in the car later."

Song Yuhui took the hamburger, and Lin Haoxi handed him a cup of Coke with a straw in it.

This is the first time for Song Yuhui to eat KFC. He usually sees it on TV commercials and thinks it is delicious. After taking a bite, he finds that the taste is weird. The green vegetables inside are not yet cooked, and the white sauce is sour. I don’t know if it is. overnight.But this hamburger costs more than ten yuan, Song Yuhui bit the bullet and stuffed it into his mouth.

Lin Haoxi asked, "Is it delicious?"

With his mouth full of hamburgers, Song Yuhui nodded graciously.

Lin Haoxi pointed to the Coke next to him, "Drink some Coke, don't choke."

Song Yuhui obediently took a sip of Coke and swallowed it.After finishing a hamburger, Lin Haoxi handed him a red bean pie.Song Yuhui shook his hand, "I'm full, brother, you can eat."

"I have another one here, this one is for you."

Song Yuhui took it, "I can't eat anymore, let's pack it."

"also."

It only takes two hours to travel from city d to city g.Song Yuhui sat by the window, and Lin Haoxi sat by the aisle. Not long after the car started, Lin Haoxi closed his eyes and fell asleep with his head resting on Song Yuhui's shoulder.

Song Yuhui didn't dare to move, for fear of waking him up.He arrived here at nine o'clock today, so he must have gotten up very early.The sun shines in through the car window and shines on Lin Haoxi's face.

Song Yuhui wanted to close the curtains without disturbing Lin Haoxi, and pulled the curtains tightly for a long time with small movements.He turned his head slightly to look at the person next to him, but luckily he didn't wake him up.

Arrive at the passenger station in G City at exactly 12:30.

There were people coming and going at the passenger station, Lin Haoxi didn't say exactly where he was going, Song Yuhui followed closely behind Lin Haoxi, for fear of getting lost.There are several buildings not far away. The glass curtain wall reflects in the sunlight, like a mirror that soars into the sky.

Song Yuhui sighed in his heart, as expected big cities are different, the houses are so tall.

"I'll take you to the subway."

Song Yuhui followed behind, nodding while responding.

The subway station at 12:30 is not particularly crowded, and the commuting time in the morning and evening is the most crowded.Lin Haoxi bought a ticket for Song Yuhui and used a transportation card for himself.

After passing the checkpoint, go forward and turn a corner, take the escalator down.The first time Song Yuhui took the escalator, he just looked around and didn't pay attention when he stepped on the middle of the yellow line. After going down the first half of the ladder he was stepping on, he lost part of his support. Song Yuhui's body was weightless and he almost fell forward.

Lin Haoxi made a timely move and grabbed his arm to stabilize him.

Looking at the escalator with a vertical height of at least ten meters, Song Yuhui broke out in a cold sweat.If it goes on like this, the consequences will be disastrous.

Everyone around looked over, and Song Yuhui also felt ashamed, lowered his head and red ears, and stood obediently.With her hand still on his arm, Lin Haoxi said softly, "Don't be nervous, remember from now on, you have to step inside the yellow line when you take the elevator."

"Yes."

Lin Haoxi taught him patiently, "When you get to the bottom, where the ground and the escalator meet, step over."

Song Yuhui nodded.Lin Haoxi was afraid that he would not be able to do it yet, so he walked down a few steps by himself, "You can do what I do when you see me later."

When the escalator reached the ground, Lin Haoxi stepped out, and Song Yuhui imitated Lin Haoxi's movements and landed safely.At this time, the train happened to be coming, Lin Haoxi took his hand and ran towards the opened carriage, "Come on!"

Song Yuhui was brought into the carriage, which was already full of people and could only stand.There were more and more people in the carriage, and Song Yuhui was forced to lean against Lin Haoxi. Lin Haoxi held the railing above his head with one hand, and put his other hand on Song Yuhui's waist, letting him stick to his side, as if protecting his girlfriend.

When I got off the subway station, it was already past one o'clock.

"Are you hungry?" Lin Haoxi asked.

"I'm not hungry, I've eaten so much and I'm still full."

Lin Haoxi didn't feel hungry either, "Then let's have dinner later and go play first."

"Ah."

In front of a very distinctive building, the sign says 'Youth Science and Technology Museum'.The first floor of the Science and Technology Museum is a display area for various scientific and technological products, involving the fields of mathematics, physics, chemistry, geography, astronomy, biology and communication.

Lin Haoxi took Song Yuhui to a model.A steel ball moves on an elliptical trajectory on a funnel-shaped surface.

Song Yuhui stared at the steel ball, wondering when it would slide down the funnel?But after waiting for a long time, the steel ball has no tendency to slide down.

Lin Haoxi asked: "Do you know why it keeps moving?"

Song Yuhui looked blank, "I don't know."

"Because the funnel inside is a curved surface obtained by reversing the gravitational potential energy curve derived from the formula of the law of universal gravitation."

Song Yuhui has only heard of gravitation, and has no idea about the formula of the law of universal gravitation.

"Then do you know why our earth revolves around the sun and the moon revolves around the earth?"

Song Yuhui shook his head. He had learned about planets and satellites in geography in junior high school, but it was only a superficial introduction, not in-depth.

Lin Haoxi explained: "Because the earth receives the gravitational force of the sun and the moon receives the gravitational force of the earth, this force is called centripetal force in physics. An object has mass, speed, and centripetal force, so it can move in a circle. When the speed, When the centripetal force and mass reach the same level, they will move in a uniform circular motion. The ball on the funnel is on the inclined plane, in addition to its own gravity, there is also the supporting force of the inclined plane, and a component force pointing to the center of its circular motion acts as the centripetal force. The iron ball itself has mass, which is consistent. Finally, the iron ball will have a speed when it is put into the channel, so it meets the conditions of uniform circular motion, even if there is no external force for it, it will continue to move.”

Song Yuhui was dizzy and looked at him apologetically, "Brother, I seem to be too stupid to understand anything."

Lin Haoxi burst out laughing, "No, these are high school physics knowledge, if you go to high school, maybe you can explain it better than me."

Song Yuhui's eyes dimmed, and Lin Haoxi noticed the change in his expression and was in a good mood, so he took out his mobile phone, "Stand here, I'll take a picture of you."

Song Yuhui obediently stood beside the model, taking pictures for Lin Haoxi.Afterwards, thinking that I didn't have any photos of Lin Haoxi on my phone, I took out my phone and said, "Brother, I'll take some photos for you too."

Lin Haoxi glanced at the mobile phone in his hand, it was obviously old, "Did you buy the mobile phone?"

"Ah."

"Where did you buy it?"

"Brother Yuqiang said he wanted to buy a new phone, so he gave me the old one."

Lin Haoxi didn't quite believe that Song Yuqiang would give Song Yuhui his phone, "Then how much did you give him?"

Song Yuhui stretched out two fingers, "Two hundred."

Lin Haoxi was very helpless, and took a look at Song Yuhui's mobile phone. This kind of mobile phone can only be taken to a mobile phone recycling shop, and it will cost a hundred at most.

Song Yuhui took a picture of Lin Haoxi with his mobile phone, but the picture was a bit blurry, because the pixel of the mobile phone is only 30.