Mo Yue smiled and said, "I am drunk too. Why are there so many deformed toads in this cave?"

Lu Fei smiled, "Yes, your question was what the villagers wanted to ask at the time. After the old man said that there was a deformed toad in the cave, everyone was silent. It turned out that the current situation in the village is far more than they thought. It's much more complicated. The young man held the glass jar and looked at the goldfish in the jar in a daze. The little fish had been dead for a long time, turning its belly, stiffening its small body floating on the water. The village chief frowned, the young man, Do you always see that dead fish? Everyone has a lot of questions to solve now, are you looking at that fish? The young man hissed, don’t make a noise, let me take a closer look. After finishing, put the jar right Observe the sun carefully. At this time, the early morning sun gradually shines, illuminating the jar. The young man squinted his eyes and stared at the jar carefully, as if staring at a unique treasure. The village head saw that the young man did not Talking, anxious, patted the young man on the shoulder, smiled bitterly, I said, young man, you have been staring at Xiao Jinjin, is it possible that this Xiao Jinjin’s death gave you any enlightenment? The young man sighed, I think all the problems The answer is here. The young man finished speaking, and pointed his finger at the jar in his hand. The village chief frowned, young man, what are you talking about? Now, there are a lot of problems in our village, and many people die, and there is still a long Legged fish and a lot of deformed toads. With such a lot of questions, you actually said that the answers to all the questions are in that jar? The young man nodded, yes. After listening to you introduce the situation in the village, I am again After careful observation, I came to the conclusion that there was a problem with the water. After the young man finished speaking, all the villagers were dumbfounded. The village chief laughed and said, young man, I know your job is a water quality inspector. There are so many weird things. You told me that it’s because of the water problem. How do you make me understand? The young man laughed. It’s very simple. My pet fish Xiao Jinjin has been with me for three years. I have always taken good care of it. Xiao Jinjin’s health is fine. However, when I passed by your village this morning, Xiao Jinjin changed the water. As a result, Xiao Jinjin died immediately. There is only one reason, that is, the water is poisonous. I heard young people That said, the villagers exclaimed in unison, and the village head was surprised, ah? Is the water in your jar not river water? The young man nodded, yes, yes, the water in this jar is the river next to your village. The water in the river. The village chief was surprised, young man, are you right? The water that the people in our village usually eat is the water in the river. If the water in the river is poisonous, then the whole village Don’t you drink poisonous water every day? Young people nodded, yes, because the river water is poisonous, people who drink river water for a long time will get sick and die suddenly, and the fish in the river and the toads in the riverside caves will become deformed. All of this is because the river water is poisonous. All the villagers are dumbfounded, they look at me, I look at you, they are all silent, even the village chief sighed, not knowing what to say. The young man coughed and coughed. Sheng, the village chief, you just asked me what I was looking at when I was staring at the glass jar? You thought I was looking at Xiao Jinjin’s body, but in fact, I was not looking at Xiao Jinjin’s body at all. I was watching the water in the jar carefully. Smile bitterly, I said young people, speak well, you say he Water is poisonous, is there any basis? You, as a water quality inspector, say that the river water is poisonous. You have to show evidence. Although I have never studied, I also know that you said that the water is poisonous, shouldn't it be proved by an experiment? The young man frowned in embarrassment, the village head, this time I was out on a trip. I didn’t bring any chemical reagents. If I did the experiment, it would be choking. However, I can bring the water back to the unit for testing. I think it’s in the water. It should be toxic. The village chief sighed. You still need to go back to the unit for testing. If the river is really poisonous as you said, how many more people will die in our village before your test report is released. The young man stared at the glass jar thoughtfully and authentically. Strictly speaking, an experiment must be done and a test report must be issued. However, the current conditions are not met, and perhaps I can determine that the river water is poisonous through visual observation. The village chief frowned, and could he consider the river water to be poisonous with his naked eyes? The young man opened the lid of the glass jar, put his nose to the mouth of the glass jar, sniffed it carefully, and smiled, yes, first of all, the color of the river water is yellowish. Normally, the water itself is colorless and tasteless, but in this jar The water, that is, the river water, has a yellowish color and smells of metal, which means that the river water contains heavy metals. The young man noticed that the village head was looking at him with doubts, and he immediately raised the jar to the village head. The village head, if you don't believe it, you can smell the water in the jar to see if it smells of metal. The village chief frowned suspiciously, put his nose to the side of the jar, and sniffed it. As expected, he smelled a slight metallic smell. He couldn't help sighing. It seemed that there was really a metallic smell. However, I can smell a slight metallic smell now. I don’t know if it’s because of the metallic smell that I heard you in advance, so I have this illusion. Boy, I haven't read a book either. This kind of hinted feeling should be an illusion. The young man smiled and said, the village head, I understand what you mean. You mean I told you in advance that there is a metallic taste in the water. This kind of advance telling you has a psychological hint to you, if you smell the water in the jar, With the preconceived notion, there was an illusion. The village chief smiled and said, yes, hey, it's better to have knowledge, I have been around for a long time, and I didn't explain it. You can explain it with just a few words. Boy, by the way, I am not really hinted by you now, am I? The young man shook his head, no, the water really smelled of metal. In fact, to determine that the river water contains heavy metals, there is another way besides observing the color of the river water and smelling the smell of the river water. The village chief frowned, what can be done? Wouldn't you still talk about experimenting? The young man shook his head, no! Since we don't have the conditions to do experiments, how can I still talk about doing experiments? The village head frowned, what method do you plan to prove? The young man smiled and said, the village head, if you take a closer look at the glass jar, do you find some green-green material on the edge of the glass jar? The village chief stared at the glass jar, squinted his eyes for a long time, and found that there were a lot of green-green moss-like substances on the edge of the jar, so he nodded, yes, it did, but what are these green-green substances? ? "