"Count one?"

Although Zhou Yan does not study high mathematics, but he is also a mathematics major, in his sophomore year, he also took over the private order of tutoring high mathematics, and tutored several students from other majors who did not want to fail the course.

Zhou Yan put aside the three books he bought, glanced at the bookshelf, and directly took out five advanced mathematics teaching aids from the bookshelf.

Zhou Yan flipped through it carefully.

Xing Xuan was looking at the three books that Zhou Yan put aside at this time, mathematical analysis... Advanced Algebra... Analytic geometry... She knows about analytic geometry, but the other two books have a headache when they hear the names.

"Is the senior a math major?" Xing Xuan asked curiously.

"Well, yes." Zhou Yan responded casually, and he put back the two advanced math books that were poor in terms of arrangement and logic.

"The senior is very powerful." Xing Xuan pursed her lips and smiled.

"It's fine." Zhou Yan smiled and handed the remaining three high mathematics teaching aids to Xing Xuan, "Choose one of these three." ”

"Senior, do you want to choose one for me?" Xing Xuan winked at Zhou Yan.

"Why don't I talk about our respective strengths, and then you can think about it." Zhou Yan said with a smile.

"Okay." Xing Xuan handed the three books to Zhou Yan.

Zhou Yan first took out a slightly older, slightly thinner teaching aid than the other two, which read "High Mathematics Intensive Lecture".

He said: "This book focuses on knowledge points, and there are not many question types set, and the difficulty is relatively easy. ”

"Hmm." Xing Xuan nodded and took the book.

Zhou Yan took out another eighty-percent new teaching aid, medium thickness, with the words "High Mathematics Question Type Election" written on it.

"In this book, the emphasis is on the question type, and there is not much involved in the knowledge points, which is divided into low, medium and high difficulty modules, which is suitable for brushing questions." Zhou Yan handed over this book of "High Mathematics Question Type Election".

"Thank you, senior, what about the last one?" Xing Xuan took it and asked with a smile.

"The last book is not very good in terms of typography, but it is very professional, and it summarizes knowledge points and some key question types, which is suitable for final assault." Zhou Yan handed over the last slightly old one and said with a smile.

The last book is called "Advanced Mathematics Practice", which is a compilation of lecture notes.

The editor-in-chief above was still the teacher who taught him "Mathematical Analysis", and Zhou Yan was a little surprised when he saw it.

"I'm sorry senior." Xing Xuan hugged the three teaching aids and said with a smile.

"So have you thought about which one to choose?" Zhou Yan asked.

"It's all there." Xing Xuan said directly.

"Both.. All of them? Zhou Yan was stunned for a moment, and looked at this girl who looked very pure and sweet and had a strong bookish temperament again, "Are you sure?" So much, can you learn it? ”

"Didn't the senior divide the functions for me just now?"

Xing Xuan said with a smile, "The "High Mathematics Question Type Election" is a heavy question type, which can be used to brush up on questions at ordinary times, "High Mathematics Intensive Lecture" focuses on knowledge points, which can be used for after-class consolidation, and "High Mathematics Practice" can be used for the final assault, these three books are all good." ”

"As for time, time is squeezed out." Xing Xuan winked at Zhou Yan again.

The corners of Zhou Yan's mouth twitched, "It's good if you're happy." ”

Xing Xuan only felt that this senior was a little cute and real, and she asked with a smile: "Senior, can I add you a QQ?" If there's a question I don't know, I'd like to ask you. ”

Zhou Yanxin said exactly what I wanted, after all, there was a good-looking beautiful girl in front of him, and he was still happy to make a friend.

Zhou Yan smiled and nodded, "Okay, how much is your QQ number, I'll add you." ”

Xing Xuan reported the QQ number.

Zhou Yan took out his mobile phone and quietly changed the QQ nickname to a'. Then select Add Xing Xuan as a friend.

Xing Xuan's nickname is [Dog Learns Dog Shake Shake], and her avatar is a cold anime girl wearing black glasses.

Seeing this, Zhou Yan smiled dumbly, and said, "You can see that you should love to learn very much." ”

"Senior, don't laugh at me."

Xing Xuan said with a smile, "But the senior's nickname and avatar are very simple." ”

The nickname is just one'. The avatar is a cartoon male avatar that comes with QQ, and the simple one couldn't be simpler.

But since he is studying mathematics, it must be simple and direct, and Xing Xuan didn't think much about it.

"Hmm." Zhou Yan nodded and didn't say anything.

Xing Xuan briefly chatted with Zhou Yan about learning again, but felt that Zhou Yan knew a lot, and some things she didn't understand or even didn't know were suddenly cleared up by Zhou Yan, and even Zhou Yan told Xing Xuan some things that could make her better get grades and prepare for Baoyan, Xing Xuan made up her mind to communicate with this senior more, and some places that she didn't know could be completely consulted with this senior.

The time was almost up, Zhou Yan and Xing Xuan went to check out together, and then Xing Xuan said goodbye to Zhou Yan and left with three textbooks.

"How's it going, young man, uncle has done you a great favor?" The bookstore owner asked with a smile.

"Hmm." Zhou Yan nodded.

"Speaking of which, I would like to thank the young man for letting me sell three more textbooks." The owner thanked.

"You're welcome." Zhou Yan waved his hand.

"Well, is the young man interested in doing odd jobs in his uncle's shop, I see you have a lot of opinions on the selection of teaching materials." The boss asked with a smile.

Zhou Yan shook his head, "I don't have much time." ”

"Yes, graduate school entrance examination." The boss didn't care too much, he asked again: "If you don't want to add me to QQ, it will be more convenient to buy books in the future." ”

"Okay."

These days, QQ is a very fashionable thing, from elementary school students to middle-aged people, basically use QQ.

This is also understandable, after all, just the QQ farm in the QQ space can attract a large wave of uncle fans, although this is copied by Penguin from the happy network, but in this era when traffic is king, it seems that it is not worth mentioning.

When Zhou Yan returned to the dormitory, he found that the two living treasures who went to the Internet café all night were still snoring, Chen Xiaole had woken up, playing LOL in front of the desk, Chen Xiaole's scolding was worthy of the name of Zu'an, but it was strange that he did not wake up the two living treasures on the bed behind him, he could only say how good he was last night and how dead he slept now.

Zhou Yan could only hold his stomach and eat the breakfast given by Xiao Li'er, but he still brought Chen Xiaole a breakfast, and Chen Xiaole casually said 'thank you' and began to concentrate on playing the game again.

Zhou Yan walked to the balcony and enjoyed the view outside the window.

Zhou Yan is located in Building 18, and the building opposite is Building 14 where the School of Management is located, and between the two buildings is a small garden with a large camphor tree, a small metasequoia, and some other tree species.

Including the agarwood cinnamon that grows against the propaganda column of the college, it has been lit with orange and yellow color at this time, and the osmanthus is clear and dusty, and the thick energy is far overflowing, even if Zhou Yan is still far away from it, he can still smell the fresh and fragrant fragrance of osmanthus.

There are paths in the forest, and Zhou Yan can see several couples walking in the forest, and some even hug each other directly, doing kissing games.

"! God! Brother Yan, come here! ”

Chen Xiaole suddenly screamed behind him and shouted.

Zhou Yan rubbed his eyebrows, startled.

He came to Chen Xiaole's side and asked, "What's wrong?" ”

Chen Xiaole pointed to the screen tremblingly, his body was also trembling, and he stammered: "Up.... Rose... The limit is up! ”

"Brother Shen!"

"Hmm!"

Shen Changqing walked on the road, and when he met someone he knew well, he would say hello to each other or nod his head.

But it doesn't matter who it is.

There was no superfluous expression on everyone's face, as if they were very indifferent to everything.

on this.

Shen Changqing is used to it.

Because this is the Demon Suppression Division, it is an institution that maintains the stability of Great Qin, and its main responsibility is to kill demons and monsters, and of course there are some other side jobs.

Arguably.

In the Demon Suppression Division, everyone has a lot of blood on their hands.

When a person is accustomed to seeing life and death, then he will become indifferent to many things.

When he first came to this world, Shen Changqing was a little uncomfortable, but over time he got used to it.

The Demon Suppression Division is huge.

The people who can stay in the Demon Suppression Division are all powerful masters, or people who have the potential to become masters.

Shen Changqing belongs to the latter.

Among them, the Demon Suppression Division is divided into two professions, one is the town guard and the other is the demon exterminator.

Anyone who enters the Demon Suppression Division starts with the lowest level of demon slayer.

Then step by step, he is expected to become a town guard.

Shen Changqing's predecessor was a trainee demon slayer in the Demon Suppression Division, and he was also the lowest level of the demon slayer envoys.

Have memories of the predecessor.

He is also very familiar with the environment of the Demon Suppression Division.

It didn't take long for Shen Changqing to stop in front of an attic.

Unlike other places full of slaughter, the attic here seems to stand out from the crowd, and in the bloody Demon Suppression Division, it presents a different tranquility.

At this time, the attic door is open, and there are occasional people entering and exiting.

Shen Changqing only hesitated for a moment, and then stepped in.

Access to the attic.

The environment has changed in vain.

A burst of ink fragrance mixed with the faint smell of blood came to his face, making his brow furrow instinctively, but quickly stretched.

The smell of blood on everyone's body in the Demon Suppression Division is almost impossible to clean.