Why are earthquakes unpredictable?

(1) Maybe we have many secrets in outer space, and we have the ability to explore some nearby planets, but we don't know much about the earth under your feet, and we don't know much more about what's under your feet than what's on your head. Today, only Russia has drilled to a depth of about 65,438+02 miles on the earth's surface. The highest record in China is 6000m, which is half of them. But the radius of the earth is 6000 kilometers. If the earth is an egg, we just make a very shallow and small hole in its thin shell. So our understanding of the interior of the earth is very indirect and superficial, just like the primitive tribesmen's understanding of the nature in front of us.

People attribute all things they don't know and can't predict to mystery, but mystery is the source of rumors and far-fetched explanations. No country or organization claimed to have predicted the Indian Ocean tsunami disaster. The submarine earthquake and the continental earthquake are actually the same thing. All over the world, the problem of this prediction cannot be solved. We know very little about the earth. Experts say that the Indian plate moves to the Himalayas every year. Yunnan-Guizhou, Sichuan, Gansu and Tibet are all earthquake-prone areas, but we don't know or understand how it actually moves, let alone when it moves and when it stays calm. Only God knows!

Some people say that the migration of toads is an exact and obvious omen of earthquakes, and people can prevent them before they happen. This view seems reasonable, but it is actually untenable. Many instinctive behaviors of living things are unknown to people and are also caused by many natural factors. They belong to the mysterious field and are uncertain. It is a joke, and it can only be used as a joke to predict the extremely macroscopic movement of the continental plate and crust, as well as a catastrophic event-earthquake. As for rumors, Beijing is 88 days away from August 8, 2008. Saying that it is providence is actually superstition, stupidity, nonsense, and demagoguery with ulterior motives.

In the face of earthquakes, there are no prophets among human beings. Only after the disaster, it is the most wise and necessary to act quickly to reduce the direct damage and the indirect damage. Therefore, in a country with frequent disasters like Japan, the disaster prevention system is sound, fast and flexible, which is worth learning from. We should also have such a perfect emergency system for disaster prevention and relief, which can not only resist the damage caused by human development to the environment, but also take strong revenge on mankind, and effectively prevent those unpredictable natural disasters from causing serious losses to human material wealth and even life. In the face of natural disasters, superstitions and complaints are stupid. The important thing is action, that is, extending a hand of mutual assistance and friendship and fighting disasters together!

1. In the first paragraph, examples, charts and comparison methods are used. The function is to accurately highlight our understanding of the earth's interior is very indirect and superficial by comparing the depth of surface drilling in Russia and China with that in radius of the earth.

2. Can the word in the middle of the following two sentences be removed? Why? Please choose a sentence and give a brief answer.

Only Russia has drilled to about 12 miles on the earth's surface.

But we don't know or understand how it actually moves.

(1) can't be deleted, because the approximate figures in the "left and right" table, if deleted, will become that Russia's deep drilling on the earth's surface is just 12, which is inconsistent with the facts. The use of this word reflects the accuracy, rigor and scientificity of the words used in the discussion.

② It can't be removed, because the meaning of "actually" is true, concrete and accurate, which means that we don't know or understand the specific situation of its (Indian plate) movement, which reflects the accuracy, rigor and scientificity of the words used in the discussion.

Read paragraph (3) carefully and express your understanding of the phenomenon of "toad migration" in concise language.

Biological behavior is caused by natural factors, and its migration is related to living environment, living habits and climatic conditions. Although it is sometimes one of the precursors of earthquakes, it is not an inevitable factor.

4. After reading netizens' comments on the Wenchuan earthquake, please talk about your views in the last paragraph of the article.

User 1: So far, simple weather forecasts are sometimes inaccurate, not to mention earthquakes caused by extremely complicated crustal movements. Therefore, what we can do is to resist earthquakes and save the outburst, and we will not say anything else.

Netizen 2: An earthquake of magnitude 8.0 occurred in Wenchuan, and the whole of China was shaking. The Chinese nation has encountered unyielding difficulties, and the people of China have never fallen. Today, as sons and daughters of China, we should tide over the difficulties with practical actions, unite as one, and show the unity and strength of the people of China to the world! May the friends in the disaster area tide over the difficulties as soon as possible.

Netizen 3: Don't talk about understanding the earth. Human beings also have a superficial understanding of themselves. Man himself is a very precise combination of cellular systems. Who can predict what disease he will get tomorrow? The wise behavior is to further improve the rapid response and disaster relief work, to be able to respond quickly when disasters occur, and to reduce casualties and property losses. This is what we should do as well as possible.

Wenchuan earthquake is unpredictable, so we can't be superstitious and complain. After the earthquake, the government organized earthquake relief, and the Chinese people United as one and acted together to tide over the difficulties. Further improve the emergency mechanism for earthquake prevention and disaster reduction, act quickly when disasters occur, and reduce casualties and property losses.