Three students chased out of the classroom after class to ask questions.

Wu Tongguang found the first student through Wang Nianru first, his name was Xu Zhihan, and his glasses were thicker than the bottom of the bottle.

Xu Zhihan had already learned from Wang Nianru about Professor Zhu's sudden heart attack and sudden death.

"Classmate Xu, this is Chief Wu, he has some questions for you, please cooperate well."

Xu Zhi Han Mu Mu Nene nodded.

Wu Tongguang first appeased him, but he had not yet recovered from Professor Zhu's sudden heart attack and sudden death.

Wu Tongguang said: "We are also very sad about Professor Zhu's sudden death, I want to know if you chased the professor outside the classroom to ask questions before the professor entered the lounge?" ”

Xu Zhihan said: "Yes, I am asking questions. ”

"Oh, what questions were asked?"

"The question is about the content of the professor's lecture today, and I didn't understand some basic concepts about mechanics."

"For example?" Wu Tongguang asked again.

"The professor said that 'ox' is used to represent the magnitude of the force, but I don't understand this concept very well."

This student, when Professor Zhu asked everyone to use words to describe "great strength", he cited an idiom, and then he still did not have a thorough grasp of the process of transforming "intuitive sensibility" into "precise mathematics".

"Did you ask outside the classroom?"

"Yes, Professor Zhu hasn't gone far yet, I just asked outside the classroom."

The classrooms are far from the lounge, and there are two rooms, one on the far right and one on the far left of the hallway.

"How long has it been?"

"Maybe two minutes, and the professor told me the concept of 'cow' again."

"Oh, that's right...... Do you notice anything unusual about the professor's mental condition? Wu Tongguang asked.

"No, as usual, he was in a very good mood today and the class was very humorous and interesting."

"After I asked the question, the professor helped me answer it, and then asked me to look at the textbook again, I didn't dare to rest, so I read in the bright corridor of the corridor."

"Where is the corridor light?"

"That's right." Xu Zhihan pointed out the outside of the classroom, which was at the far left end of the corridor and was connected to a large piece of glass.

"You were reading in the hallway, did other classmates or teachers see you?"

"Yes, there are a lot of classmates walking through the hallway, and they should have seen me."

Wu Tongguang asked again: "Then are there any other people who ask Professor Zhu questions after class?" ”

"It seems that there is no ......"

"So what do you think this is?" Wu Tongguang took out a small roll of fine hemp rope from Professor Zhu.

Xu Zhihan said: "I haven't seen it." ”

Wu Tongguang said curiously: "So, Professor Zhu didn't demonstrate this thin hemp rope with you in the last class?" ”

"No, I'm sure not."

Xu Zhihan, who was immersed in reading in the corridor, didn't seem to have a question, and he couldn't ask why.

The second student's name is Bai Wenyu, his name is like a girl, he is delicate and delicate, and he is very weak, but at a glance, he knows that he is obviously much more clever than Xu Zhihan.

"Professor Zhu has passed away?" He confirmed it several times.

"You were the last to talk to Professor Zhu, so we had to ask you something."

"Good! Sir, what do you want to ask? ”

"What were you doing during the 15-minute break after Professor Zhu finished the last class?"

Bai Wenyu said: "After class, I chased after me and wanted to ask Professor Zhu a question, but I saw Xu Zhihan talking to Professor Zhu at the door of the classroom, so I waited in my seat for a while before going out to ask questions." ”

"Your seat is in ......"

Bai Wenyu pointed to the seats in the first row, which just happened to see all the movement at the door of the classroom.

Wu Tongguang asked, "How long have you been waiting in your seat?" ”

"About two or three minutes, I sorted out my notes, and when I looked up, I saw Xu Zhihan alone in the corridor, Professor Zhu had already left, I hurriedly chased it out, and the professor walked to the staircase, and I asked him a question."

The classroom is at the far left end of the hallway, the staircase is in the middle of the hallway, and the lounge is at the far right end.

"What questions did you ask?"

"Professor Zhu is talking about gravity today."

Wu Tongguang asked, "Gravity." ”

"The professor said that a small object falling from a high altitude can form a force because of the falling distance of the high altitude and the acceleration of gravity, which is also a law discovered by Newton."

Wu Tongguang asked, "Then what didn't you understand?" ”

"I didn't understand the constant of acceleration, but I asked the professor and I figured it out."

"How long have you been talking to Professor Zhu?"

"About three minutes."

Wu Tongguang thought to himself: "In this way, the professor has already taken up one-third of the time of these two students during the 15-minute recess. ”

He then asked, "Do you see other students asking questions?" ”

"Yes, Situ Wenwen is also asking."

"That's a girl?" Wu Tongguang was a little curious when he heard the name.

"Yes, it's a female classmate, very powerful, she is the best student in our class, and Professor Zhu often praises her, saying that she can understand everything." There was some admiration in Bai Wenyu's words.

Wu Tongguang asked again: "Did you see this female classmate asking questions?" ”

"I didn't see this, but after I finished asking, I went back to the classroom, and I bumped into her at the door of the classroom, holding a note, and I was going to ask a question."

"Didn't you 'see' her talking to Professor Zhu?" Wu Tongguang emphasized the word "seeing" this time.

"No, but I asked her casually. She asked me, 'Are you done?' I replied: 'Yes, do you have a question too?' She nodded, and chased after her. ”

At this time, Professor Zhu should have already walked to the far right lounge.

Then this Situ Wenwen was the last person the professor had seen before entering the lounge.

Wu Tongguang continued to ask, "What are you doing during the rest of the rest time?" ”

"Well, I'm chatting with two other boys in the class."

Wu Tongguang asked, "What are you talking about?" ”

Bai Wenyu smiled a little embarrassedly and said, "What else can boys talk about, of course it's about girls......

"Is that Situ Wenwen?"

"How do you know?" Bai Wenyu exclaimed.

Wu Tongguang smiled: "Presumably she is a beauty, she rarely talks to boys on weekdays, you just said a few words to her, so it became news among boys." ”

"Hehe......" Bai Wenyu smiled embarrassedly.

"She seemed very upset that we were talking about her, and she asked for a while before she came back to the classroom, heard us chatting, put down her book and went out again."

Wu Tongguang was thinking, so to speak, Situ Wenwen, who asked the third question, was talking to Professor Zhu at the entrance of the lounge.