This paper briefly describes the reasons for the increasing frequency and intensity of geological di

First of all, natural causes are the root cause of the frequent occurrence of geological disasters. Recently, the global geological activities have become more active, especially the activity of the ** volcanic belt around the Pacific Ocean has become more and more active. Basically, it can be considered that the Pacific Rim region has now entered a frequent cycle.

At the same time, some geological activities are significant, geological disasters are prone to occur in areas and densely populated areas coincide, some areas have rapid population growth, strong momentum of economic development, the number of population and wealth per unit land area has increased significantly compared with before, once geological disasters occur, it is bound to cause large-scale population and property losses.

It must be fully recognized that human factors play an important role in the process of inducing geological disasters, and sometimes even become the dominant factor. The frequent occurrence of geological disasters such as landslides and debris flows is directly related to the large-scale destruction of vegetation in the mountainous areas in the upper reaches of the river, and the mountain topsoil suffers serious erosion, and the rock mass is fragile and loose, which is very easy to cause when the short-term rainstorm occurs. In areas with complex geological conditions in the upper reaches of the river, the construction of water conservancy facilities may change the original local in-situ stress conditions, and when the equilibrium state is broken, it will occur, and even produce certain destructiveness.

Human impact on nature is becoming more and more intense, and extreme weather is occurring more and more frequently.

A few years ago, could you imagine a temperature change of more than 10 degrees over two days? There is basically no transition phase in temperature.

The occurrence of drought in the south and heavy rain in the center of the country is of course increasing with the increase of extreme weather.

The following description of the geological disaster sedan car is correctly carried out ().

a.There may be several types of geological hazards in a region, and they are generally unrelated in their causes.

b.Strengthening the study of science and technology and establishing a monitoring and early warning system for geological disasters is one of the effective measures to prevent geological disasters.

c.Human activities cannot alleviate the damage caused by volcanoes.

d.The intensity and frequency of geological disasters are increasing, and they have nothing to do with human activities.

Correct answer: B

Global environmental pollution has a certain impact.

China: On April 14, 2010, 2,183 people were killed and injured in the Yushu** class in Qinghai, and 84 people were missing.

From September 2009 to April 2010, the area affected by drought in five provinces and cities in southwest China was 100 million mu, with a direct loss of 24.6 billion yuan.

On May 12, 2008, 68,858 people were killed, 366586 were injured, 18,618 people were missing, and the economic loss was 845.1 billion yuan.

The snowstorm that began on January 10, 2008 was affected by low temperature, rain, snow and freezing disasters in 19 provincial-level administrative regions, killing 60 people. 2 people are missing, and 10,000 people are urgently relocated; 1,000 hectares of crops affected; 10,000 houses collapsed and 10,000 houses damaged; Direct economic loss 537100 million yuan.

The eruption of the Icelandic volcano on April 3, 2010 is expected to affect the global meteorology for two years.

At 14:34 Beijing time on February 27, 2010, 850 people died in Concepción, Chile's second largest city.

At 16:53 on January 12, 2010 (5:53 Beijing time on the 13th), 150,000 people were killed on the Richter scale, and it is expected to reach 200,000 in 2009, and influenza A caused tens of thousands of deaths worldwide on December 26, 2004, and a tsunami caused by Indonesia** Scale: Richter depth: 30 kilometers Epicenter: ...

More than 510,000 people were injured in 2003, and the global SARS epidemic caused nearly 1,000 deaths, accounting for 11% of the mortality rate

Answer] C Answer Analysis] Test Question Analysis: The option point of view is correct and in line with the meaning of the question, in the question, natural disasters occur frequently in China, and scientific disaster prevention and mitigation is extremely important for economic and social development, indicating that the geographical environment is the basic element of social and material living conditions, and at the same time, it shows that although geographic climate change is complex, there must be internal laws, so it was selected. The option view is wrong, and the correct play of subjective initiative is conducive to preventing disasters, but it is not possible to prevent disasters from occurring, the complex conditions of geology and landform cannot be broken, and seepage is not the key to scientific disaster prevention and mitigation, so it is excluded.

Test point: This question examines the objectivity of the materiality and laws of the human society.

Sub-question 1: c

Question 2: Analysis of Question D:

Question 1: The geological disasters near the source in China are mostly manifested as landslides and debris flows, and their formation is related to geology, topography and climate, while the resilience of natural disasters has nothing to do with their occurrence.

Question 2: The diagram shows a landslide on a slope that has collapsed, indicating a landslide.

Comments: The key to solving this question is to grasp the influencing factors of natural disasters.

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This phenomenon is caused by the unconventional exploitation of "groundwater and coal". From a few hundred meters to several thousand meters underground, many places are already "empty". When it comes to shaking or rain, it is easy to have this so-called "sky falling".

C. Analysis of test questions:

China is located at the junction of the world's two major belts, and the frequency of disasters is high, the scope is larger than that of hail and oak, and the damage is heavier. The hills in the south of the Yangtze River have abundant precipitation, high groundwater levels, dense river networks, and no soil salinization problems. Landslides and debris flows mostly occur in mountainous areas with steep slopes in the central and western regions, and land subsidence mostly occurs in large cities in the east where too much groundwater is pumped, next to the source.

Vegetation destruction and large-scale engineering activities are important reasons for the increasing frequency of landslides and debris flows in China. So C right.

China's April 14, 2010, Qinghai Yushu ** killed and injured 2,183 and 84 missing, September 2009 - April 2010, drought in southwest China, 5 provinces and cities affected by drought area of 100 million mu, direct loss of 24.6 billion yuan, on May 12, 2008, Sichuan Wenchuan ** level caused 68,858 people killed, 366586 injured, missing 18,618 people, economic losses of 845.1 billion, January 10, 2008 snow disaster, 19 provincial-level administrative regions are affected by low temperature, rain, snow, and freezing disasters, 60 dead; 2 people are missing, and 10,000 people are urgently relocated; 1,000 hectares of crops affected; 10,000 houses collapsed and 10,000 houses damaged; Direct economic loss 537100 million yuan on April 3, 2010, the eruption of the Icelandic volcano is expected to affect the global meteorology for 2 years, Beijing time at 14:34 on February 27, 2010, the second largest city in Chile, Concepción, the Richter level ** died 850 people, at 16:53 on January 12, 2010 (5:53 Beijing time on the 13th), 150,000 were killed on the Richter scale, and it is expected to reach 200,000 In 2009, influenza A caused tens of thousands of deaths around the world, and on December 26, 2004, Indonesia ** caused a tsunami Scale:

Richter Depth: 30 km Epicenter: ...More than 510,000 people were injured in 2003, the global SARS caused nearly 1,000 deaths, and the mortality rate accounted for 11%.

In the 21st century, there were mainly tsunami in Indonesia, tropical storm "Sid", hurricane Katrina, Chile**, Wenchuan**, and volcanic eruptions in Iceland.