"That...... What is 'high and flush, length square, width equal'? Siyu bit her lip and asked embarrassedly.

"This teacher usually talks about 'three views' when he talks about it...... You, you're definitely deserting from class," Xia Pengfei knocked on Siyu's head, and his eyes suddenly froze, "Where's your hairpin?" ”

"Hairpin...... I took it off when I was in the shower. Leng Siyu thought for a moment, "Maybe it's on the edge of the bathtub." ”

"I'll get it for you." Xia Pengfei stood up and ran towards the bathroom.

"Hey, hey, that's a girl's bathroom!" Leng Siyu looked back at Xia Pengfei.

"There's no one in there, what's the matter. Oh, here, found it. Xia Pengfei's voice came from the bathroom. Leng Siyu looked back at the orange halo of the chandelier, and suddenly felt a little confused in his heart......

Xia Pengfei was very interested in bringing Siyu's crystal hairpin and found that a rhinestone had fallen off. said to Siyu: "You have lost one of your hairpins, you have to replace it with a new one." ”

"I love this hairpin. It was my dad who brought it back to me at YN. Siyu felt a little pity.

Xia Pengfei sat down next to Siyu, pointed to the rhinestones and said:

"Tomorrow I will ask Aunt Hao to take it to our store, and it will be the same as new for you to set another rhinestone, there are many rhinestones in the store, and the manufacturer will give a lot of rhinestones when sending similar products."

Si Yu's eyebrows flew with a touch of joy, "That's great." ”

Xia Pengfei put the hairpin into his bag, and the corners of his mouth hooked a trace of arc, "Siyu, this hairpin really sets your skin tone very well." ”

Siyu was seen by him with a tight scalp, hurriedly took the question book, and said fiercely: "Hurry up and tell me what 'high and flat are equal in length and equal in width'." ”

Xia Pengfei smiled deeper, took the question book and said: "'Height is flush, the length is square, and the width is equal' is the corresponding equal relationship between the length, width and height of the main view, the left view and the top view that should be paid attention to when drawing the 'three views'.

'High level' means that the height of the main view and the left view are equal, so the height is equal and the drawing should be aligned;

'Long alignment' means that the length of the main view and the top view are equal, so the length is equal and the drawing should be aligned;

'Equal width' means that the width of the left and top views is equal, so the width is equal and the width should be equal when drawing. ”

Siyu was confused, "That...... I'm ...... A little confused......"

"It's simple," Xia Pengfei took the scratch paper and explained while drawing on the scratch paper, "What now?" ”

Siyu suddenly brightened, "I understand now." Sure enough, the drawing is more abstract and intuitive......"

"Is there anything else you don't understand?"

"Not yet."

"Now it's time for you to tell me a little bit of history, right?" Xia Pengfei took the question book, folded it with the scratch paper, put it on the coffee table, and looked back at Siyu with expectant eyes.

Regarding Xia Pengfei's request for history learning, Siyu always couldn't bear to refuse.

What's more, Xia Pengfei is good in all subjects except history, and if history advances by leaps and bounds, he may be one step closer to his life ideal.

Being able to play a booster in Xia Pengfei's learning process is also a realization of self-worth for Siyu.

Xia Pengfei could see the traces of momentary thinking in Si Yushui's eyes, but he couldn't guess whether she was thinking about history or something else.

"Silk Rain?"

"You know the evolution of capitalist economic theory, right?"

"Should it be mercantilism during the artisanal workshops, to the liberal economic theories that prevailed after the Industrial Revolution, to the Keynesianism that emerged in the late nineteenth century after the Second Industrial Revolution, intensified during the Great Depression, and prevailed after World War II?" Xia Peng replied without thinking.

"Wow, that's good!" Leng Siyu slapped Xia Pengfei's arm with a palm, "It's not a small progress!" ”

Xia Pengfei only felt the hot pain in his arm, and he didn't care about it, just staring at the light in Leng Siyu's eyes in a daze.

Leng Siyu further elaborated that "mercantilism promoted the rapid accumulation of wealth in feudal countries, and also objectively promoted the rapid development of the capitalist economy."

"Silk Rain, did mercantilism also lead to the fact that commercial capital was significantly stronger than industrial capital in the early stage of capitalist economic development?" Xia Pengfei raised a question with a certain amount of thinking.

Leng Siyu nodded, "Yes, this situation was only changed after the Industrial Revolution...... Looks like you've done a lot of homework during this time. ”

"In fact, these theories can basically be regarded as the alternating application of planning regulation and market regulation by the state?"

Xia Pengfei has not read so many economics textbooks in vain, and his understanding of economic history is deeper than that of most liberal arts students.

"So, do you know what the connection between liberal economic theory during industrialization and the new economic liberalism of the capitalist world in the eighties of the twentieth century?" The cold silk rain disrupted a third-order Rubik's cube and restored it layer by layer.

"Both emphasize the role of the market, with the former advocating complete laissez-faire and the latter advocating moderate intervention." Xia Pengfei noticed that the blood stains on Si Yuxian's hands had disappeared, and he couldn't help but sigh in his heart the magic of the cold family's safflower oil.

Xia Pengfei also found that he and Leng Siyu only had a cultural exchange that would make the atmosphere so harmonious.

As long as it involves economics and emotions, cold silk rain is an attitude of rejection.

The next day, when dining in room 0301, Xia Pengfei handed Siyu's hairpin to Hao Xiaoli and advised, "Aunt Hao, you can find a time to go to 'Fengyuan' today and make up for the rhinestones of this hairpin." ”

"Okay, I'll go after breakfast." Hao Xiaoli put down her chopsticks, took the rhinestones with both hands, and put them in the satchel behind her.

The boss who does a big business would be so concerned about a small hairpin, which Hao Xiaoli and Lan Lan can't understand.

"I heard from my sister that my father bought this hairpin for my sister, and when my father bought this hairpin, I was still in my mother's belly." Madoka solves the mystery of the two nannies.

The little worm sandwiched a lobster for Xiao Yuanyuan, "Yuanyuan, don't talk patronizingly, eat more meat." ”

"How did Sister Lan learn her car?" Xia Pengfei suddenly asked Lan Lan.

"I took the first subject, and now the second subject is almost ready." Lan Lan went to serve dinner for Xia Pengfei.

"I don't need it, fill it up again." Xia Pengfei took the bowl in Siyu's hand and handed it to Lan Lan.

"No need! I can't eat so much, I haven't exercised much lately, and the amount of food is much smaller," Leng Siyu's eyes widened, "Xia Pengfei, why do you even have to take care of me eating?" ”

Lan Lan was in trouble and didn't know who to listen to.

Xia Pengfei said to Lan Lan: "Add half a bowl to her."

Lan Lan picked up the bowl and went into the kitchen.

Xia Pengfei persuaded Siyu with good words, "You are so thin, don't eat more, how can you bear the heavy study tasks, and half a bowl can't support you." ”

The villain Xia Pengfei had a super evil idea in his heart that he didn't say.

If you don't take care of your body, how can you withstand my wanton destruction in the future?

"Xia Pengfei, you are becoming more and more disagreeable! Believe it or not, I'll kick you into the air and make you draw a beautiful parabola in the air in a freefall motion! Leng Siyu took the rice bowl handed by Lan Lan, and said hatefully while picking up the rice.