"Example: Let A={x|x2-1=0}B={-1,1}'If the elements are the same, the two sets are equal'

That is: (1) any set is a subset of itself.

(2) True subset: If ...... Then set A is a true subset of set B, denoted as ......"

On the podium, a math teacher with a Mediterranean hairstyle was explaining the main points of knowledge.

Chi Qing sits in the middle of the three or four rows, which is a prime location!

Being able to look at the blackboard and not waste your neck, have a buffer time to answer questions, and not be watered by the teacher's "rain and dew" is a golden legend!

After 45 minutes of chattering, the class was slightly delayed before the class was announced.

Lin Yi, who was light-minded, didn't need to listen to the class, and he had taken this before, so he didn't bother to listen to it again, so he began to study whether meditation should be added to his daily practice.

Ever since he saw that one of his contractors had skyrocketed in his ability through meditation a few days ago, Lin Yi had begun to think about this problem, and he had just made up his mind to add meditation to his daily practice.

Seeing that the class was over, Lin Yi didn't pay attention to it, and continued to feel every part of the bones burned on his hands with his heart in the sky.

Slow down your breathing, slow down your heartbeat, empty your mind of all distracting thoughts, and concentrate on perceiving your bones.

"When class time comes, please enter the classroom in a hurry and prepare for class. The melodious bell spread throughout the school, and all the students returned home.

Chi Qing and his class walked out of the classroom with solemn faces, as if they were going to some wolf's den and tiger's cave next.

I went around and came to a very large open-air stadium, where there were about four or five classes of people, and one class had already started to practice under the guidance of the teacher.

"Class 19 of high school!Go and move the scales, the mat, and the prone-bending body, the old rule, I have to test you first when school starts.

There will be a men's 1700m, a women's 1500m, and another test for those with special abilities. ”

Chi Qing is in the ninth class of high school, but there are boys who don't need her little girl to move those sports equipment, and a group of boys are competing to grab the first and go.

After bringing the utensils, the physical education teacher came over with a stopwatch and a whistle and a statistical table.

The physical education teacher's surname is Cai, he should be thirty or forty years old, his hair is gray, and his eyes are gray and gray.

Under the supervision of Pei Yi, the representative of the physical education class, the team was quickly formed, and when Mr. Cai walked to the front of the team, he had already stood up from left to right, from tall to short, and stood up a neat square team.

"Okay, I haven't forgotten what I taught, go, let's go run ten laps first, today the math teacher in your class has something to change classes with me, and the two physical education classes are in a row.

Turn right, take the lead, run faster, take a bigger step! Follow behind! Don't let me go! Run!"

"One-two-one!one-two-one!one-two-one!"

"Wow!Wow!Wow......"

Chi Qing's face was dead at first, because in the past, just ten warm-up laps were enough to tire her to the point that she felt that life was not worth it.

Ran Goose, not only is he not tired today, but he even feels that he should run a little faster!

After Lin Yi sensed her thoughts in Chi Qing's mind, he smiled evilly, gathered thunder and lightning and wrapped it around the thunder spirit bracelet, stimulated Chi Qing, and changed the headphones to on-demand mode, Senbon Sakura!

[BGM: Senbon Sakura]

[Additional range: 100 meters radius of the center of rotation]

[Additional Status: Excited: Nervous Excitability +100%, Fatigue -50%, Stamina Recovery Speed +75%, Cell Regeneration Speed +5%]

"Bold not 敵にハイカラ revolution

Lei "falls" against the country

日の丸印の二輪車転がし

Collapse ICBM

環状線を走り抜けて

東奔西走なんのその

......”

The passionate song echoed in everyone's ears, and there seemed to be a flame burning in their eyes!

"Bang ......"

The steps are bigger, the speed of the feet is faster, and the fighting spirit is gradually surging!

However, there is also an impact, the team at the beginning is very neat, the fast ones are a little more convergent, and the slow ones can barely keep up.

But after the war song sounded, everyone threw off their legs and ran wantonly like Huan, and because Lin Yi's bad taste set the range to a radius of 100 meters from the center of rotation, the entire stadium was boiling!

A well-aligned queue run turns into a race to be the first!

Every classmate is not willing to be left behind, they are all killed by tens of thousands of people in several nearby cities, and everyone has their own arrogance!

Those who have abilities begin to use their abilities, and those who don't have abilities are unwilling to catch up, but they are unexpectedly knocked out by several physical education teachers who are about to run.

This is also a protective measure against their arrogance, and after they are stunned, a teacher who specializes in psychiatric abilities will construct a dream for them, allowing them to sweat freely in their dreams.

By the time all the ordinary students were knocked out, the track turned into a wonderful ability show!

All sorts of abilities appear on the field, but they all have pride, and they don't stumble on other opponents!

Beasts transform into a variety of beasts, such as cheetahs, arctic wolves, white tigers, Komodo dragons, and more.

The elemental abilities are "hilarious", and no elemental ability can escape responsibility in the melted and shattered runway.

The fire ability turns into a flame, and the tornado goes on a rampage, and then the wind ability flies through with a cyan tempest tornado.

As a result, the wind borrowed the fire, the fire helped the wind, and there was an ice ability behind to change the track to an ice rink, and this took a total of ten laps, so you can imagine how miserable the final track will be.

The black lightning gradually changed from the thickness of a silk thread to the width of a pencil, wrapping around Chi Qing's body to stimulate the cells in his body.

After discovering that the additional state had a state of increasing the speed of cell recovery, Lin Yi gradually increased the output power of the Thunder Spirit Bracelet, and it can be said that Chi Qing is equivalent to being reborn every three laps.

The cells of the body die and regenerate, and under the stimulation of various states, all the cells of the body will be replaced in about three turns.

The energy is the lightning given by Lin Yi, but after stopping the output of the Thunder Spirit Bracelet, Chi Qing will become very hungry, and the food he eats into his body will be quickly converted into the energy of proliferating cells.

To put it simply, it is to obtain a binge eating without fat physique!

With the rebirth of body cells, Chi Qing's running speed is getting faster and faster, and in the end, if the newborn body is not strong enough, then Chi Qing, who maintains that incredible speed, will definitely disintegrate!

The current kept flowing in the body, the cells died and died, lived and lived, and finally the cells completely adapted to the black lightning created by Lin Yi and began to produce independently!

Each cell is a small engine, and each engine consumes chemical energy to convert into electrical energy infused with dark elements.

After ten laps, Chi Qing's height was higher, his weight had decreased, and his complexion was a little whiter than before.

After the team was rearranged, several teachers began to bring back those students who had built their memories to wake up, and most of the arrogance was effectively preserved, but there were still a few ...... Scrapped.

Everyone, whether they had any abilities or not, looked like they were about to get dehydrated or not, and the PE teacher forced them to stay where they were until they were no longer panting before letting them drink water.

The sip with the water cup is slowly sipping, and most of the people who don't bring the water cup are boys, directly facing the tons and tons of water pipes, and they have water fights with a few brothers when they are full.

Lin Yi shared her time in Chi Qing's mind, and she was a little envious in her heart, even with mixed tastes.

Retract your gaze and cut off your six senses, and forcibly let yourself recall the events of your previous life and your parents in the ice coffin, which will stabilize the shaken heart, and even make it stronger!

Let go of the six senses to gather thunder and lightning and dark elements into the thunder spirit bracelet, and the ten circles just now consumed one-thousandth of the energy, and I will make up for it at this time.

After that, he continued to meditate, and unless he was in danger, he usually chatted with Chi lightly at most, and spent the rest of the time meditating on his weapon.

"Alright, bunnies, hurry back and test, don't drink too much raw water, be careful to go home and have diarrhea!"

The physical education teacher stood in the distance and yelled, and when he turned his head, there were still some students who were able to catch the flashing nostalgic smile in his eyes.

After that, all the test pools were light at the middle and upper reaches of the level, because there were many abilities such as the electric system that ran fast, and the beast snake system had a lot of them, and it was impossible to win the first short-term test in each test.

Among the other tests for the ability, only one actual combat won the first place, and when Lin Yi snatched control of his body, Lin Yi couldn't help but leave a little combat experience in Chi Qing's memory.

Time spent in the daytime, night competition and monitoring contractor, 19 days have passed in a blink of an eye, and the next time I come back, it will be time to attack the Hell of the West!

On the night of the 20th day, Chi Qing had already slept, and Lin Yi carefully transformed a pawn-type armor for her, using the primary space folding technique, which was the size of only one playing card.

Write a letter in the words of their world, which tells the use of that playing card-sized Dongdong, where Chi Yuan put it, what he is going to do, etc., etc.

Put it in the most conspicuous place, and finally replenish the energy of the thunder spirit bracelet, took a deep look at Chi Qing, and left under the coercion of the nine lightning rods.

The Lei Ling Bracelet was transformed by him to be able to lead thunder and replenish energy on rainy days, so that even if she was gone, she would not be too bothered.

A few minutes after Lin Yi left, Chi Qing got up and turned on the light, and read slowly, word by word, reading and reading, two lines of tears slowly flowed from his eyes, wetting the letter paper.

From the initial strangeness to the later talk about nothing, it only took 20 days, and Chi Qing told Lin Yi almost everything about himself.

He was the first to know whether he was crying or laughing, and sometimes he would even run out to teach those individuals a lesson in order to get angry for himself, and always came back with a faint smell of blood in the end.

Put the letter away, there was a sentence on it that made her have to cherish this letter - I am gone, if I don't come back, then I may never come back, take care.