“…… The regression equation is used to statistically control the change of the Y value, and the goal of statistical control is achieved by controlling the range of x.

If the regression equation between the concentration of NO2 in the air and the flow of cars has been obtained, the concentration of NO2 in the air can be controlled by controlling the flow of cars...... "Under the bright light, Jin Feifei is gently solving his doubts for the silk rain, and his dark eyes are flashing with a rational luster.

Siyu also listened carefully, and then buried herself in her homework and continued to write her homework......

The obsessive and selfless state of learning gives Siyu an extraordinary charm. Jin felt that the silk rain at this time was more beautiful than ever......

On Binjiang Road, a luxury car is speeding past Huaxiang Alley.

A teenager in the passenger seat suddenly shouted, "Brother Cha, stop." ”

The boy is Liu Xudong.

Liu Xudong got out of the car and saw a fair lady on the side of the road preparing to walk towards Huaxiang Lane.

"Zhiqiu-" Liu Xudong greeted the object he wanted to provoke some time ago.

"It's you, Xudong." Ye Zhiqiu saw Liu Xudong and suddenly felt a little sad.

"Where are you going?" Liu Xudong asked.

"I'll go to 'A Date with a Beauty' to see Siyu."

"What are you going to see her for?"

"She met Jin Feifei today, and I'm a little worried about her."

Liu Xudong burst out laughing, as if he had heard the funniest joke in the world.

"Worried? Are you worried about the silky rain? ”

"What, is there a problem?"

"Zhiqiu, why aren't you worried about Jin Feifei? Unless that girl loves money, twenty Jin extraordinary can't help but have a cold silk rain. ”

Liu Xudong said that after all, he was still surprised that Ye Zhiqiu could worry about Leng Siyu.

In Liu Xudong's cognition, Ye Zhiqiu is vain and selfish, and has a strong sense of class, she used to look down on Leng Siyu and disdain to be with Leng Siyu.

Don't say worry about Leng Siyu, even if you can say a few words calmly with Leng Siyu, it is difficult.

"Then I'm not going to see her, I'll go back." Ye Zhiqiu slowly turned around and walked back.

"Zhiqiu-" Liu Xudong suddenly stopped Ye Zhiqiu.

Ye Zhiqiu turned around and looked at Liu Xudong with starry eyes, "Is there something wrong?" ”

"I'll send you." Liu Xudong said.

"No, thank you. Not a few steps. Ye Zhiqiu politely refused, and then walked along the sidewalk on the side of the street.

The back was a little depressed.

After Liu Xudong got into the car, he said, "Let's go."

Chanan started the car, and the wheels rolled forward.

Ye Zhiqiu's figure became clearer and clearer, and gradually blurred in the rearview mirror......

"It's beautiful." Chanan said.

"School tweed," Liu Xudong smiled, "The singing is also beautiful." ”

"Then you won't invite her to sing a few songs?"

"Another day, I have to go back to my homework today."

"You still do your homework?"

"If you can maintain good grades without doing homework, you pick one out for me! Xia Pengfei's IQ is so high, he doesn't have to do a lot of training.

Xueba is practiced, not blown out! ”

"Just kidding!"

……

Siyu finished a math paper, and when she saw that it was late, she said to Jin Feifei, "Extraordinary, it's a little late, I want to go back, I still have to go back to do my political geography homework." ”

Jin Fei smiled magnificently, "Okay, I'm fine, you see that you didn't drink your coffee, and you patronized the question." ”

Siyu picked up the coffee and poured it into her stomach like a drink, and after drinking it, she saw Jin Feifei staring at herself in a daze, so she asked stupidly, "Am I drinking too quickly?" ”

Jin Feifei said gently, "It's natural, it's very free, it's mainly for fear of choking you to ......."

"Waiter, pay the bill." Siyu looked up like a waiter and beckoned.

"This little gentleman has already paid." The waiter came over and smiled in response.

"How much?"

"One hundred and sixty dollars."

Siyu immediately frowned, took out her mobile phone to unlock it and opened WeChat, "Extraordinary, WeChat ID!" Okay, I'll ask you, it's a matter of principle. ”

Jin Feifei knew that Siyu was serious, and he didn't want to lose a big deal because of a small loss, so he said the WeChat ID.

After Siyu finished the transfer, she put away the test paper and stood up, "Then I'll go back." ”

Jin Feifei accompanied Siyu out of the café, and Siyu said apologetically: "I said that I invited you to coffee, but I didn't talk to you much, and I asked you to help me talk about the topic, I'm sorry." ”

"Believe it or not, I'm really happy tonight."

"Uh, let's go."

The back of the silk rain disappeared in a blink of an eye under the city lights.

"A girl like lightning!" Jin Feifei sighed and left.

……

Two people came out of a shadow, Xia Pengfei and Liu Xing.

"Why are you avoiding her?" Liu Xing asked.

"She wants to know that I'm following her, and she can't kill me?" Xia Pengfei said, "Let's go now, I'll invite you to have a cup of coffee." I can't let you run for nothing. ”

……

Siyu returned to Room 0101, Unit 1, Building A, Phoenix Community, and saw that the two children were still using the learning machine on the sofa.

Leng Siyu snatched the learning machine, threw it on the sofa, and said, "Two little monsters, you are more desperate than the junior high school students!" Isn't it tiring to study? ”

Xiao Yuanyuan asked the little worm, "Are you tired?" ”

The little worm replied: "I won't be tired if I have a little round by me." Let me study alone for ten minutes and I will be tired. ”

Siyu sent the little worm to 0301, and when she went home again, Xiao Yuanyuan said excitedly: "Sister! Brother Fei brought me the bonus. ”

Leng Siyu roared "take a bath" and carried Xiao Yuanyuan to the bathroom, put water on the bathtub, and then stripped Xiao Yuanyuan and put it in the bathtub......

The little round fluttered in the water...... The water splashed the silk rain that was in the wide clothes.

After a while, the two red American silver were wrapped in a piece of silver foam, Leng Yuanyuan was so foamed that only two eyes were exposed, his legs were splashing, and he shouted happily: "Sister, it's so comfortable to take a bath!" ”

"Giggles, sister isn't allowed to tickle me-"

"Nonsense! Am I good at rubbing my back? ”

"Sister, I'll rub it for you."

"Hmm."

"Are you comfortable?"

"It's boring, you're trying hard!"

"It's still a baby!"

"Let you hit the punching bag, you don't hit the sandbag!"

"It's impossible to punch sandbags, it's impossible to punch sandbags in this life!"

In the living room, Siyu's mobile phone ringtone "Dream Wedding" has rang N times, but none of them have been heard by the two people who are taking a bath.

……

Xia Pengfei stood in the courtyard blowing the cold wind and wondered.

The lights are on in the living room, so you shouldn't have slept, so why don't you answer the phone.

Mr. Xia has the spirit of perseverance, and he will not give up until the milky white light in the living room goes out.

On the 283rd call, he finally heard a voice like heaven, "Say-"

"I want to study history." Xia Pengfei actually wanted to say another sentence, but he found that only this sentence was the master key for him to open the door of Siyu's house.

Immediately after, the doorbell rang.

"Wait a few minutes......" Siyu hurriedly shouted.

The visit of the beautiful boy caused a bare-butted and only a bath towel in room 0101 to be busy for a while:

"Shorts! Sister! ”

"Bath towel, sister!"

"Pajamas pajamas, Yuanyuan!"

"Hair hair! Blow it off! ”

said that it was a few minutes, and when the sisters went to open the door after they were busy, Xia Pengfei waited outside the door for at least half an hour.

When Siyu opened the door, Xia Pengfei's eyes lit up.

The silk rain wrapped in the nightgown is a sexy look of the water hibiscus. The snow skin exposed to the air and the plump aura reflected from the top and bottom of the body are as charming as they are.

"Believe it or not, I'm gouging out your eyes." Siyu said fiercely.