Li laughed out of the firewood room, his legs trembling a little with excitement. Xindao: Do you want Xiao Tie to run away with me? Li Xiao asked himself several times in his heart.

At this time, there was almost no moonlight, and it was dark all around, and I could vaguely feel Ah Huang beside me. Sure enough, just when Li Xiao decided to save Xiao Tie, Ah Huang shook his head and shook his tail, rubbing Li Xiao's hand with a dog's head, Li Xiao had an indescribable affection for Ah Huang. Human nature here is sinister, only Ah Huang will not bully him. So he gave Ah Huang the portion of food he kept. Ah Huang was overjoyed, and ran away with his head in his mouth. It seems that Ah Huang also knows that he has eaten an extra portion of food of his own tonight.

On the way to the kitchen, Li Xiao was a little excited, and said in his heart: Now that I think about it, is the math teacher quite cute? The math teacher also has a mantra: "Students, there are always more ways than difficulties, and we can diverge our thinking and solve more problems in one problem." ”

Divergent thinking - the vocabulary that the teacher always hangs on his lips, thinking about the problem from different angles to solve the problem, and seeking another way to solve the problem. Now that I think about it, there is some truth to the fact that "there are always more ways than difficulties".

Li Xiao didn't dare to call Xiao Tie out loud, so he tiptoed to unload the kitchen door, and after a lot of effort, he didn't move the door panel. It seems that the specific analysis of specific problems is a big truth.

In desperation, Li Xiao could only knock on the kitchen door, but the tired Xiao Tie was already asleep, and he didn't answer after knocking for a long time. Li Xiaoxin said: It is important to escape for your life, anyway, Xiao Tie does not worry about eating and drinking, and there is no need to escape. If I wake up Xiao Tie, if he yells and calls Chef Tie, I'll be finished.

Li Xiao wanted to climb the wall to escape, but why couldn't he climb these courtyard walls, which looked not high during the day? Li Xiao guessed depressedly in his heart: The math teacher's "high eye, high hand, low hand" may refer to the situation I am facing now.

Li Xiao walked around the courtyard in front of the kitchen and firewood room, and found that there was no low wall that could be easily escaped, and there was no hole in the wall that could be drilled out, what should I do?" The corner door of the rear compartment has been locked, and it is impossible to pass. I've already left the door of the firewood house, do I have to go back and wait for the right time in the future? No, absolutely not. Escape should be done sooner rather than later. Iron Chef, that fat red man, I don't want to see him once, and that old iron, why did he put me in the kitchen? Could it be that I was asked to work in the kitchen? In the years of famine, it is certainly not normal for me to eat and drink casually in the kitchen as a foreigner. In short, there must be an escape tonight. I think I'll have to dig through the wall and escape.

Just as Li Xiao decided to dig the wall with a kitchen knife, he found that Ah Huang had been looking at him with his curious dog eyes. It was dark, but the dog's eyes were shiny with a faint green glow.

Li Xiao looked at Ah Huang and thought: If you can speak, it would be fine, tell me how to get out and show me a way out. The mute can't speak, but he gestures with his hands. Ah Huang, you don't have hands, only four feet.

The math teacher once said, "As long as there is no mistake in the problem, it is a problem, there is a solution." ”

Li Xiao pondered, my dog has been tied down for a long time, and after being released, it will come back after a turn. Now I'll untie Ah Huang's rope and let you go. I hope you can show me a way out, and I will thank you for the rest of my life.

Li Xiao followed Ah Huang and walked directly to the corner door leading to the rear compartment, and there was a small drainage ditch under the wall next to the corner door. Ah Huang turned around and opened his mouth ambiguously to Li Xiao as if he was greeting his companion, and after a whiner, he lay down in the ditch, crawled forward, opened the lid of the drain outlet with the dog's head, and climbed out.

Li Xiao leaned down and found that there was a fan shaft on the upper part of the outlet of the drainage ditch, and a mesh cover with a small mesh was installed. Since it had not rained for a long time, the mesh screen used to block the outlet of the drain was blocked by dust, so the net cover seemed to have become a cover.

This net cover is used to block the exit of the drain, which can not only prevent the cats and dogs from getting in, but also drain the rainwater in the yard in time on rainy days. If there is a large volume of leaves and other debris that cannot be discharged, you can open the fixed fan, open the net cover like opening a door, push out the debris, and then close the fixed fan, and the net cover will be fixed again.

Such a delicate little mechanism has been inadvertently destroyed by Ah Huang. Li Xiaoxin said: Without Ah Huang, this "dog hole" is really hard to find.

After throwing the kitchen knife out of the "dog hole", Li Xiao was completely lying in the ditch, wriggling like an insect, and finally stuck his head out of the wall, but his shoulders couldn't come out, and Li Xiao was so anxious that he was sweating profusely. Seeing that he could escape from Lehe Restaurant, he couldn't complete this last step now.

Ah Huang had already run far away, and when he turned around and saw that Li Xiao had not come out, he hurriedly ran back, looking at Li Xiao curiously, his eyes were green, his tongue was sticking out, and he made a sound, as if he was laughing at Li Xiao, not even as good as a dog, and seemed to be encouraging Li Xiao. Try to climb out.

Li Xiao tried for a long time, retracted his head in annoyance, and sat in the drainage ditch, feeling a little apprehensive, "What about going back now, or continuing to escape?" Drill out, how to drill out?" Li Xiao tried again, but still couldn't get out. He stripped off his clothes and couldn't get out.

My head can get out, but my body can't get out?

The teacher taught me, how to get out? Li Xiao lay on his stomach in the drainage ditch, thinking hard about the teacher's words.

A person carries a bamboo pole into a city gate three meters wide and high, he can't get in with the bamboo pole horizontally, and he can't get in with it vertically, and he can't get in when he puts the bamboo pole one meter higher than the city gate, when he puts the bamboo pole obliquely, the two ends are just against the two opposite corners of the city gate, and asks how long is the bamboo pole?

This is a Pythagorean theorem test question, the so-called Pythagorean four strings five is the solution to this problem, at that time this problem was very seriously commented on by the mathematics teacher, but also said to us: "Students, after doing this problem, I will give you a brain teaser question, the question stem is still this person carrying a bamboo pole into the three-meter-wide city gate, if this bamboo pole is not five meters long, but six meters long, think about it, can you pass through this city gate?"

I remember that many students who studied well at that time replied no, without thinking. Of course, some people replied that they could. Later, the teacher asked a classmate to publish the answer to the brain teaser. It turns out that no matter how long the bamboo pole is, you can put the bamboo pole perpendicular to the city gate and take it directly in. This incident made me understand that nothing can be done in isolation from reality. When this math teacher gave a lecture, he also said a lot of digressions, one of which was: "The head can pass, the body must pass." ”

This sentence of the math teacher, under what circumstances did it come out, I forgot. But it did be said. Now that my head has come out, why can't my body come out?

yes, yes, I remembered. The math teacher said this when he was talking about "parallel lines and intersecting lines". At that time, when I talked about parallel lines, I talked about the iron bars of the anti-theft windows that were parallel. The math teacher said by the way: when designing the anti-theft window, the distance between the two iron bars on the anti-theft window is less than half of the width of the head, do you know why it is designed like this?

My classmates said they didn't know. The math teacher explained that for normal people, if you drill the gap between the iron bars, your head can pass, your body will definitely be able to pass, and if your head can't pass, your body will not be able to pass. Therefore, the distance between the two iron bars is less than half of the width of the head, and even if the thief removes one of the iron bars of the anti-theft window, it is difficult to drill through the anti-theft window.

I remember that many of my classmates were skeptical. Some of them tried it at home after class, and they all said that the math teacher didn't deceive people.

When Li Xiao thought of this, he was in a good mood and was not in a hurry. After calming down, Li Xiao leaned his shoulders hard, squeezing his shoulders out of the wall at the cost of rubbing his flesh and skin. Generally speaking, the meat on the chest, abdomen and buttocks is the biggest obstacle to drilling, and Li Xiao is only fourteen or fifteen years old, how can he have extra meat; besides, meat can be squeezed.

Li Xiao exhaled all the qi in his stomach, which shrank his abdomen a lot, and it was easy to get out. Li Xiao sighed: "It's really knowledge that changes fate, thanks to the teachings of the math teacher." This also made Li Xiao understand some biological common sense, the human skull is basically fixed and cannot be deformed. Other parts of the body can be thinner by changing their position, exhaling or squeezing. This is just like giving birth, as long as the baby's head can come out of the birth opening, the possibility of a difficult birth is very small.

After the whole body came out, Li Xiao was refreshed and in a good mood, and he was just about to bend down and want to fish out his clothes, when suddenly a big black shadow rushed towards him, and he was startled.