On One Hundred Ways of Breaking the Bends

On the way to school, Team Wang kept reminding Qiu Feng to slow down, "It really doesn't look like your car, drive slowly! What's going on?"

Qiu Feng said: "Yesterday morning Du Juan insisted on going to class, so I asked Wen Ning to watch her. Wen Ning called just now, saying that Du Juan imitated the murderer's modus operandi in class and covered her with a piece of plastic cloth." a piece of eraser, and smashed it."

Wang Dui's eyes widened, "Huh? It stands to reason that when Du Juan entered her parents' room, the plastic sheet was no longer there. She probably didn't know about it."

Qiu Feng frowned, "So Wen Ning called, and she thought Du Juan was the murderer."

Wang Dui raised his forehead, "Could it be possible to solve the case?"

Qiu Feng stared at the signal light that was about to turn green, and silently shook his head.

When the two arrived at the school, Du Juan was already restrained in the office.Seeing the two of them coming over, Wen Ning unconsciously breathed a sigh of relief.

"You guys are here."

Qiu Feng deliberately pissed her off, "Isn't it just to look after a child, as for being so scared."

Unexpectedly, Wen Ning didn't turn back, but took a look inside in horror, turned his head and said to him: "You don't know how scary it was just now, she has been holding that eraser since yesterday, and she didn't let go of it while sleeping. I thought she was just nervous, but just now, she suddenly tore off the tablecloth, took a knife from the pencil case at the same table, and stabbed at the eraser! I was stunned at the time, and when I realized it, I Saw her looking at me! Looking at me!"

Wang Dui glanced in, turned around and asked Wen Ning, "Then why didn't you ask her about that eraser?"

Wen Ning said, "I asked, and she said it was a school tool."

Team Wang: "..."

The three of them thought it over, and finally decided to stop her course here and take her back.

Wen Ning said, "Then I'll go and bring her out." After speaking, she opened the door and went in.

Qiu Feng asked Wang Dui, "What do you think?"

"Let's try it first. After all, she didn't see the details of the plastic sheeting, so she is still suspicious. If she can tell all the details, it's almost the same."

"But why do I think she did it on purpose?"

"Well, what did you say?"

"Ah, nothing."

After a while, Wen Ning brought Du Juan out. Just like yesterday, she still looked like she had nothing to do with her, but the current Wu Qing couldn't deceive anyone.

"Du Juan, I am Captain Wang of the criminal police team, and I want to get to know you..."

Qiu Feng stood behind Team Wang with his back against the wall. He carefully observed Du Juan's expression.Then he walked over and patted Dui Wang on the shoulder, leaned behind his ear and said, "I'll go and see the scene, and call me if I need anything."

"Hey, let's go."

Qiu Feng handed the car keys to Team Wang, then turned and left.He took a taxi and went directly to the university where Wang Yang was. After calling, he found Wang Yang in the laboratory.

He was still wearing that white and half-worn coat, and his hair was uneven and white.But Qiu Feng watched from a distance, and felt that compared to the Wang Yang he saw in the experiment class last time, he was obviously much more energetic today.

Wang Yang noticed something, turned his head and smiled at Qiu Feng, beckoning him to come in.Qiu Feng nodded, opened the door and went in.

"Qiu Feng is here."

"Uh-huh."

"what happened?"

"It's nothing."

Seeing that he was not active, Wang Yang turned around and searched in the white cabinet.Qiu Feng noticed that the door of the cabinet was made of wood, and many memories in the laboratory were made of wood. He thought it might be because many reagents were sensitive to light.

Soon, Wang Yang took out a small brown bottle, sucked up a little bit of the reagent with a dropper, and raised his head at Qiu Feng, who obediently extended the back of his hand to him.A drop of cool liquid dripped on the back of the hand, and fell along the arc of the back of the hand.

Qiu Feng hurried to pick up the liquid, but Wang Yang didn't seem to care, he turned back and put the bottle back.Turn around and say to him, "Smell."

Qiu Feng was stunned for a second, then came to his senses, put the back of his hand under his nose and smelled it.But he didn't smell anything, he raised the back of his hand and looked at Wang Yang in surprise.

Wang Yang laughed again, clenched his right hand on the back of his hand, put it about 10 cm below his nose, and shook it back and forth.

Qiu Feng looked at his things, as if he understood something, he also shook his wrist, and was shocked by the smell.

"Wow! What is this?" Qiu Feng smiled unconsciously, pulling the corners of his mouth.

"I call it seawater hodgepodge." Wang Yang said with a little pride.

Qiu Feng said: "It's amazing, I feel better all of a sudden."

"Of course, this is a mixture of seawater from 7 different sea areas in the world. The seawater itself has the effect of relieving stress and clearing up the mood. How do you feel better now?"

Qiu Feng nodded and agreed: "It's much better. I remember that you mentioned this knowledge in the experimental class last time. I remember it was..."

"Magnesium bromide, a water-soluble cleaning chemical."

"This is really amazing, by the way, the one we had yesterday..." When talking about the taste, Qiu Feng thought of Du Juan.

"Yes, I was just about to tell you." Wang Yang took out a document and handed it to him, "I collected this from the door of the crime scene yesterday, and did a reagent analysis. The ingredients are alcohol, water and A little acetic acid."

"Acetic acid?" There was something other than alcohol, which surprised Qiu Feng.

"It's acetic acid, and it's the presence of this acetic acid that makes me certain of my judgment. Let me show you this."

Wang Yang brought Qiu Feng to the whiteboard, where there were some pre-drawn things. He pointed to the whiteboard and explained to Qiu Feng, "It's like this. The honey we usually eat contains a lot of active yeast. Among them There is a kind called sugar-tolerant yeast. It has a wide range of sources and can be said to be ubiquitous.

Given the right circumstances, it can break down the sugar in the honey into alcohol and carbon dioxide.If you go one step further, in the presence of sufficient oxygen, it can further decompose the alcohol to form acetic acid and water.I'm guessing that's what you smelled in the first place. "

"There is such a thing! Doesn't the honey I usually buy go bad automatically?"

"Generally speaking, no, because sugar-tolerant yeast cannot survive in a high-concentration environment, and it is difficult for it to develop in general finished products. And even if there is sugar-tolerant yeast, its content is very small. "

Hearing this, Qiu Feng suddenly realized, "You mean that the murderer is a person who has been in contact with fresh honey for a long time!"

"Yes, there is one more important point." Wang Yang took a test tube from the shelf, and dripped another drop on the back of Qiu Feng's hand.

This time Qiu Feng obediently swung his wrist from side to side, and an indescribable fragrance hit his nostrils.

"This is the man's bee, the source of honey: Sophora japonica."