"Teacher Lu, we weren't bitten by a snake, but we all joined forces to catch the black hand who put the snake in our dormitory last night."

Zhang Peipei, as the head of the dormitory, was the first to stand up at the critical moment.

"Those three snakes were caught by us last night, and they were put in his bucket this morning while Zhou Chengzhe was brushing his teeth. There was a basin of water pressed on top of the bucket, and he didn't pay attention to it, so he stuffed the bucket and basin under the bed. We're just giving him back what he's stuff! The figure that flashed outside our window last night was clearly a man! ”

Zhou Chengzhe's eyes sank: "Why do you say it's me without evidence!" ”

The appearance of Zhang Peipei and Jian Junling disrupted Zhou Chengzhe's plan and made him nervous.

"We didn't say it was you, Zhou Chengzhe, don't be in a hurry not to admit yourself. Moreover, just because you are aggressive today, isn't it suspicious to make Yun Xi sit on the charge? You were the first person to jump out and frame Yunxi, and the other classmates were not as active as you! ”

Zhao Yumo got up and scolded him back.

"You! It's clear that you are teaming up to frame me! I didn't do anything! You thieves shout that there are many thieves, and naturally everything is up to you! ”

Being in a weak position, Zhou Chengzhe was afraid that this matter would make him a certainty, so he could only turn his head to Lu Zhiwei for help.

"Teacher Lu, you also saw it, they joined forces to frame me! It's planting and blaming, I didn't do anything at all! ”

Lu Zhiwei looked at Yun Xi, and before he could speak, Yun Xi snatched the words first.

"Since what everyone said seems to make sense, let's do a test! We've come here this time to brush up on biology, and occasionally we have to do experiments, so we use experiments to test who got these snakes! ”

Lu Zhiwei narrowed his eyes slightly, this genius girl who has never made a move, finally doesn't plan to put herself out of the matter.

If she makes a move, it means that this show has just begun!

"The laboratory is not far from here, so I asked this teacher to come over and get some C acid, the school sewer is connected to the canteen, the water must contain insoluble oil components, C acid can make the oil condense and change color in the chemical reaction, even if you wash your hands to remove the smell and traces, the superficial oil remaining on the surface of the skin can also stay for a while, as long as you put your hand into the aqueous solution of C acid, your hand turns brown, it means that you have touched something in the sewer. This teacher is carrying a cage full of dirty water from the sewers, and you can be the first to do the experiment. ”

"Good! I'm going to ask someone to dilute it with an aqueous solution of C acid. ”

As soon as the teacher carrying the cage left, Zhou Chengzhe suddenly became nervous, and his hands were clenched into fists in his pockets and trembled slightly.

He didn't expect such a show, and he didn't expect Yun Xi, a dead girl, to come up with such a way to test it!

His hand touched the cage containing the snake last night, and although he had gloves, the gloves were cotton thread and not waterproof!

What now? Once he puts his hand in the C acid, it will definitely be exposed!

How is he going to make up for this lie for himself?

Yun Xi glanced at Zhou Chengzhe's restless appearance, and sneered lightly in front of the black cage, just in case.

Soon, the C acid diluted aqueous solution was sent over, and the teacher who carried the cage did the experiment himself, and sure enough, after a while, the palm of his right hand was dark brown as if it was dyed.

Teacher Xu looked at it from the side, and he also reached into the basin to brush it, but the color of his hand did not change.

Yun Xi raised his eyebrows, "Teacher Xu, teachers and professors, just now Zhou Chengzhe said that this glove was left outside the window by me, and the glove is still wet, which means that the hand that catches the snake must also be contaminated with the water in the sewer, so I'll do the experiment first!" ”