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When everyone is back in the classroom, the class bell has already begun to be ringed, and the biochemistry teacher has already entered the classroom, the biochemistry teacher's name is Ran Xiaozhan, and he is a very humorous teacher. Pen "Fun" Pavilion www.biquge.info

Teacher Ran laughed in every class, although everyone laughed in class, but this subject is always the best in the school grade, so the principal has no reason to object to Teacher Ran's class like this.

Tingting also likes to take biochemistry classes very much, medical courses are indeed very boring, and only biochemistry and laboratory classes are relatively easy, and Tingting is also easy to take naps in class.

Sometimes even a class sleeps from beginning to end, but the biochemistry class really didn't take a nap, and today the teacher will be a course where chromosomes determine the sex of men and women, and the students are even more curious about it.

I only heard Mr. Ran say: "We have a total of 23 pairs of chromosomes, of which 22 pairs of chromosomes are autosomes, and only the 23rd pair of chromosomes are sex chromosomes, which are different for men and women. ”

The madman was still very excited during the lunch break, and he was still muttering on the way to the cafeteria with Tingting Qingqing: "We girls all have xx chromosomes, but boys have xy chromosomes, which is really interesting!" ”

Qingqing just smiled and looked at the madman, she is a reserved girl, she usually treats her friends with the mentality of a big sister, and Tingting is also a lively and active girl, so every time Tingting and the madman always have to quarrel for a while, this time is no exception.

Tingting smiled and said, "Crazy, can you have some talent?" You've been inking for almost an hour at this point, and I said during the break, I think it's better for you to be a biochemistry teacher in the future, teach this class every day, class by class, and then go to another school after talking about it! ”

Maniac: "You die Tingting, do you see that you are injured, and think that I can't bear to torture you, are you in a hurry?" Well, I'll do it for you! ”

Saying that, the madman began to chase Tingting to squeak her, Tingting was really scared at first sight, the madman was like a very energetic, Tingting was cleaned up every time and begged grandpa to tell grandma!

The two of you are chasing me and running so lively, but they are not far away from Qingqing, chasing for a while Tingting really feels that her physical strength is insufficient, and then she runs behind Qingqing and asks Qingqing to block the madman for herself, Qingqing said at this time: "Do you two still want to eat, if you don't eat, then continue to make trouble!" ”

Tingting also begged for mercy: "I'm really crazy, you see I'm still sick!" Don't chase it! ”

When the madman saw that Tingting also forgave him, he stopped making trouble, but said this: "See if you dare to ridicule me in the future!" ”

Tingting deliberately said: "Don't dare, don't dare!" ”

Then the three of them finally arrived at the cafeteria, and the cafeteria at this time was also overcrowded, some of us were queuing, and some were occupying seats, because they were afraid of squeezing Tingting, so Tingting and they arrived relatively late, Qingqing proposed to go back to the dormitory after eating and eating.

Tingting said, "Then can the administrator let us bring the utensils out?" Enough to choke, right? ”

The madman said, "Yes, you can't!" ”

Qingqing said, "Why don't we eat later?" ”

The three of them were turning around and walking out, behind them, "Li Yi stop and wait!" ”

Tingting looked back: it turned out to be the squad leader Gu Zhengqi, "Squad leader, do you have something wrong?" ”

Gu Zhengqi said: "Let's make a table, where can I have a place to sit for the three of you." ”

Tingting glanced at Qingqing and the madman, Qingqing nodded, and the madman looked indifferent, so Tingting said, "Okay, thank you squad leader!" ”