Li Xin was named by the teacher to help her classmates, her little face wrinkled, but she still agreed, "Teacher, I will, Hongscarlet, if you don't understand anything, you can come and ask me, you haven't been here for a semester, I don't know how many places my grades have advanced." ”

Although Qin Hongfei didn't have a good impression of her dog, seeing her look like she was active and willing to help Yun, outsiders seemed that she hadn't come back for a semester, but in fact, she had returned to the classroom after more than 20 years, let alone ...... There may be a lot of things that need help.

I gladly accepted, "Thank you." ”

This exchange was quite pleasant.

The first class is to teach homework, Qin Hongshou has no homework, she is familiar with the knowledge in the new textbook, from studying for a doctorate to studying in the third year of junior high school, it would be a bit hypocritical to say that the textbook knowledge in the third year of junior high school is still remembered.

There are no parents left who forgot it early, but it won't be enough to forget it all, and you can still remember it by memorizing it.

Even if you can't remember the knowledge points, it's okay to interpret them yourself.

Qin Hongfei familiarized herself with the few textbooks she had in her hand, and suddenly had a number in her heart, fortunately, the memory points are still there, and if you are not there, make up for it, it is enough to use it.

Promise the old lady ninety points, and there will be no problem.

Flipping through it, she saw an equation and paused, this question ......

Li Xin has been watching her, knowing that she didn't read last semester, there must be a lot of things that don't understand and need help, thinking of the teacher's advice, she said a little arrogantly, "What's wrong, what don't you understand, do you need me to lend you the homework?" Let me tell you, if the teacher hadn't asked me to borrow it from you, I wouldn't have borrowed it, and no one else wanted to borrow it, and my grades were excellent! She smirked.

Qin Hongshou really needed help, and Li Xin was willing to help, so she asked politely, "Well, there is something you don't understand, how do you solve this equation." ”

Li Xin looked at a chemical equation.

The teacher taught it last semester, but because he said it was the bishop in the second half of the semester, he didn't talk too much.

Ribose is an essential substance for human life, and ribose is known to ...... After browsing the questions, Li Xin suddenly felt like the students who wrote the exam papers at the time of each exam, and the confidence that my exam papers could get full marks, "The teacher has talked about this question, I remember, I'll calculate it..."

Qin Hongxuan was suddenly interested and watched her convert.

The other classmates were bored, and they also came over, there were many people, Li Xin had more face, and the equations and answers were solved in three or two, and she instantly got the sighs and praises of the other classmates, she was proud in her heart, and directly patted Qin Hongshou to see, waiting for her adoring eyes and praise.

Qin Hongshou was also looking forward to it, but when she saw the final answer, she was speechless, she really shouldn't have great hopes for her fellow table who walked the dog and didn't lead the dog, seeing that the other classmates were suspected of being misled, in the friendliness of her classmates, she said quietly, "Li Xin, your answer is wrong." ”

"How is that possible?" Li Xin retorted without thinking about it, "I remember what the teacher taught last semester, and you didn't come last semester, how do you know if it's wrong." ”

She felt that she was right and did not accept rebuttals.

Qin Hongshou said because I knew that the answer to this question was, "C5H10O5." ”

This kind of question, the answer is not too simple to calculate, but her problem-solving thinking is crisp and neat, and the knowledge of the third year of junior high school requires an equation, Qin Hongshou just wants to know the equation, and the answer to the answer written does not meet the solution standard of the third year of junior high school.