"call out!"

In the tunnel, everyone was talking about the sky, but suddenly they saw a fat man running towards the tunnel.

And the speed is extremely fast.

Everyone was a doubt at first, and I didn't understand what was going on.

But the next second, everyone stood up, all rushed towards the tunnel.

Because everyone thinks of the first time that the tunnel is about to collapse.

(ΩдΩ)

Wang Fat and Bai Bingyang also stood up. The two glanced at each other and ran decisively towards the bus.

"elder brother!!!"

He shouted while walking, very anxious.

However, they immediately found that something was wrong.

The tunnel is intact, and there is no sign of collapse at all.

On the bus, Xu Lai and Guan Er were running towards them.

"elder brother?"

Now, the two are stunned.

"Professor Chen, look at Professor Chen, don't let him fall!"

Guan Er and Xu Lai spoke almost at the same time, pointing to the front.

Both were stunned.

Who would have thought that Professor Chen, who looks fat, can actually be so fast.

Good guy.

After Xu Lai said that sentence, Professor Chen rushed out of the bus directly, ran to the salute storage place, grabbed a pack of pH test strips and rushed out.

That speed, it's almost God.

That's right, Xu's things are pH test strips.

The pH value is the pH value, which is a representation symbol that is chemically used to measure the ratio of liquid acid and alkali.

The pH test paper is a tool used to detect solution acid and alkali.

They bring this thing to detect the pH value of aerospace food.

In the diet safety, the pH of food is also an important consideration standard.

Science shows that the pH value of human body fluid is in the weak base of 7.35 to 7.45 is the healthiest.

But due to the impact of living habits and environment, the pH value of the body fluid is below 7.35.

That is the so -called acidity.

This state belongs to sub -health.

This is why many experts suggest that people eat weak alkaline foods.

In order, Professor Chen proposed that the landslide of the mountain was caused by rainwater acidification.

Now, with the PH test paper, you can just measure it directly.

Professor Chen naturally can't help it.

"Well, what's the situation?"

"The tunnel is okay, what are we running?"

"Don't do it, it is easy to cause panic, big guy."

A group of people didn't get angry, I just felt that the lungs were about to explode.

In fact, the distance is not far away, but there is no preparation. In addition, if you don't know the situation, you are very panicked, so you are particularly tired.

"Damn, what about rain? How to stop!"

Sometimes, Tiangong is not beautiful.

It was still a heavy rain, but when Professor Chen came out of the tunnel, the rain stopped.

A round of noon was hanging in the sky, and the eyes of the dangling people hurt.

"Lao Chen, you pay attention to the impact, so many people!"

Guan Er also ran to vomit blood, squatting on the ground, big mouth.

"You come first, you can't measure it when it rains."

Xu Lai was too tired and persuaded.

Although he has a general academic performance, he knows how to use the PH test paper.

Use a dry glass stick to dip a drop of the solution to be tested, or use a tubing tube to absorb the solution dripping in the middle of the test strip.

At the beginning of school, the teacher repeatedly emphasized that the pH test strip must not be placed directly in the solution.

At this time, Professor Chen was standing outside the tunnel. After the rain, these PH test strips will be abolished directly.

At that time, Professor Chen was afraid that it would be crazy.

"Uh ... that, I'm sorry."

"I want to test something, I didn't expect to surprise you."

"Everyone go back, ha, go back, the tunnel will not ... no ... anyway, go back."

Professor Chen was embarrassed. Just now he begged to defeat everything, and made him forget the current situation.

Even speaking has become incoherent.

After a long time, I can be regarded as the last sentence back.

He didn't dare to talk anymore.

Although he believes in science, at this time, he still has to respect the metaphysics.

The corners of everyone's mouth twitched, all of them were speechless.

In the end, under the persuasion of Xu Lai, everyone returned to the tunnel.

Nympho

"Why don't it rain yet, willn't it be next time in a few minutes?"

Only in the past half a minute, Professor Chen was a little impatient.

Holding the pH test paper in his hand, the monkey was so anxious.

In this regard, Xu Lai and Guan Er both said they did not want to talk.

Let others wait, two hours do not feel at all.

But if you wait for others, it seems like a day for a day.

This is the reality.

Time goes forward for a second.

finally.

After waiting for about five minutes, the heavy rain came.

"Come!"

Professor Chen didn't say a word, found a clean glass, put the cup down, and let the rain drip it for a while.

After waiting, he quickly took the glass back.

Then use the cup wall and gravity to drop a drop of rain on the PH test paper.

A group of people stared at the paper, and they were looking forward to the next result.

Time seems to be still, and everyone is a little nervous.

A drop of rainwater in a different world can speculate that the other party's industrial process.

This sounds a little fantasy, but it is a hidden scientific reason.

"Not sour rain, not sour rain!"

Xu Lai said in silence.

He doesn't want to fight, he hates war.

But when he was thinking, he suddenly realized a problem.

Even if it is not sour, this war seems to be launched.

"wipe!"
To be continued...