Seeing that Su Yi used such a simple method to solve the problem, Bai Yichen was full of curiosity.

"Xiaoyi, how did you come up with this?"

Bai Yichen clicked on the questions on the test paper with his hand and asked.

Su Yi, who was drinking milk, glanced at the place Bai Yichen was pointing at when he heard the words, and replied casually: "Look at the question, according to qualitative analysis." ”

Seeing that Bai Yichen seemed to be a little puzzled, Su Yi put the milk cup aside, picked up the pen and began to explain.

"You see, according to this topic, you can know that the larger the V zero, the higher the distance it will rise, on the contrary, if the V zero is smaller, it may not be able to go up to the top, so, this just rises to the highest point is the minimum speed, oh, it is the V I just asked, only when the V zero is greater than V, it can slide through, this small problem is not difficult, that is, there are words, like this slide, at least, are words, easy to go around, just be careful."

What Su Yi said is called a light cloud and a light wind.

After listening to Su Yi's explanation, Bai Yichen suddenly realized, and instantly felt that his mind was clear and brighter.

But then, a problem appeared in Bai Yichen's alarm clock.

Bai Yichen looked at Su Yi with puzzled eyes, "Xiao Yi, when did you get so good at physics, don't you hate physics the most?" ”

"Oh, it's all taught by tutors."

Su Yi's face was not red, and his heart was not beating, and he took Cheng Shu as a cover.

Hearing Su Yi mention the tutor, Bai Yichen thought of the papers she gave him, those papers were collected from various cities, most of them came from Beijing University, and there were also new question papers.

Combined with Su Yi's physics explanation just now, Bai Yichen suddenly became interested in her tutor.

"Xiaoyi, where is your tutor from? Does our school recruit you? ”

"I don't know." Su Yi replied nonchalantly.

She knows where Cheng Shu is from, but Cheng Shu's identity is special, so it's better not to let others know, after all, it's no good to know.

"Don't know?"

Now Bai Yichen was even more curious.

At the same time, in fact, Bai Yichen had a place where he felt more confused.

"Xiaoyi, I heard that you are the only student in your class to make up the class, and the other students are not, do you know what's going on?" Bai Yichen asked.

This is the place that makes Bai Yichen most confused.

When I first heard Su Yi say that I was making up the class, I thought it was the whole class making up it together, but when I inquired, I found that there were no remedial classes in their class, they were all normal classes, and occasionally the teacher would open a small stove to help them make up for a small class.

Separate tutoring like Su Yi is not available to other students.

"It's not that I said it, the head teacher knew that I wanted to be admitted to Beijing University, and she arranged it, and I don't know the rest." Su Yi still explained unhurriedly.

In fact, let alone Bai Yichen, even Su Yi herself still hasn't figured out why she tutored her alone.

What the purpose of this statement is, she still does not know.

Seeing the sincerity of what Su Yi said, Bai Yichen couldn't ask anything more, lest asking too much would affect the relationship between their brother and sister, which would make it seem that he didn't trust his sister.

So Bai Yichen changed the topic very decisively.

"Then did your tutor teach you how to solve the latter one? Tell my brother about it, it's not that he doesn't understand this question. ”