Reading Answers to Sandstorm

Reading Comprehension and Answers of Sandstorm

Sandstorm

Humans always evaluate external things according to their own interests, and divide them into good and bad, while nature has another set of behavioral norms and guidelines. Nowadays, people smell the sandstorm, that is, the sandstorm weather phenomenon that the strong wind rolls up a lot of dust, causing air turbidity and visibility less than 1 meters has actually existed since ancient times. It is one of the natural forces to sculpt the appearance of the earth, a project of nature, and occupies a place in the global ecological balance.

In the geological history, the wind has screened and classified the weathered materials in the grassland belt: any coarse gravel that can't be moved is left in place to form a gravel Gobi desert; Coarse sand and fine sand with moderate particles are blown to the vicinity and gathered in situ to form a desert; Fine silt and dust with tiny particles are lifted into the sky by strong updraft for medium and long distance transportation. The loess layer of the loess plateau in China is formed by the accumulation of dust for millions of years, and the Chinese civilization was born and developed on this yellow land where dust accumulated. Australia's dust swept over tasman sea by the westerly wind in the southern hemisphere, making the soil on New Zealand's volcanic island more fertile, so it was called "the precious product exported by Australia". The strong winds blowing from the interior of Africa to the Mediterranean helped the ancient Romans to transport wheat from Egypt by sailboats, but they also brought the dust from the Sahara desert to Italy, Spain and France. Dust storms certainly increase the inhalable particles in the air, but because dust contains alkalinity, it can neutralize acidic substances in the atmosphere and slow down the occurrence of acid rain.

the wind is a conveyor belt over the earth, which blows the dust from the mainland to the ocean and the water vapor from the ocean to the mainland. When dust and water vapor meet, they can combine into clouds and eventually turn into precipitation. It can be seen that dust not only plays an important role in the distribution and replenishment of soil, but also plays an important role in the global water cycle. It can be said that dust is also a factor that determines the global ecological balance.

However, in the past hundred years, sandstorm has become a major disaster affecting human production and life. Most of the materials that constitute sandstorms in China come from arid and semi-arid grassland areas. Under the intervention of human activities, especially due to massive deforestation, excessive land reclamation, blind factory construction and uncontrolled emissions, ecological changes have resulted; Where there used to be a desert, the desert expanded; Where there is no desert, the desert is produced; The inland river process is shortened, the water volume is reduced and the swamp disappears; The green corridors on both sides of the river withered and died. In this way, sandstorms from northwest China are supplemented by new dust sources on the bare land, and are mixed with harmful components discharged by industrial and mining enterprises and germs and viruses from livestock manure on the grassland. In a word, after being disturbed by human factors, the speed of wind erosion in nature is much faster than the speed of soil formation, and a series of disasters are produced.

Goethe once said, "Nature doesn't make mistakes. People always make mistakes." This may give us some enlightenment.

reading comprehension and answers of sandstorm

7. The most accurate explanation of sandstorm is ()

A. Sandstorm is a sandstorm weather phenomenon that the wind rolls up a lot of dust and makes the air turbid, and the visibility is less than one kilometer.

B. Sandstorm is one of the natural forces that sculpt the appearance of the earth, and it is a project for nature to keep the global ecological balance.

C. From the geological history, sandstorm is the result of wind screening and classification of weathered materials in grassland belt.

D. Sandstorms are formed when coarse sand and fine sand with moderate particles are moved to the vicinity by strong winds and gathered in the desert.

reference answer: A

8. The following understanding of the sentence "Dust is also a factor that determines the global ecological balance" is wrong: ()

A. Dust is a weather phenomenon that has existed since ancient times, and it plays a certain role in the ecological balance of the earth.

B. Dust gradually accumulates to form dust storms, which play a role in maintaining ecological balance on a global scale.

C. Dust contains alkalinity, which can balance acidic substances in the atmosphere, thus slowing down the occurrence of acid rain.

D. Dust not only plays an important role in the distribution and replenishment of soil, but also in the global water cycle.

Reference answer: B

9. One of the following incorrect statements about the reasons for the aggravation of sandstorms is ()

A. Strong updraft lifts tiny silt and fine dust into the sky for medium and long distance transportation.

B. massive deforestation, excessive land reclamation, blind factory construction and uncontrolled emissions have caused great ecological changes.

C. Dust storms are mixed with harmful components discharged by industrial and mining enterprises and pathogenic viruses from livestock manure.

D. After being disturbed by human factors, the speed of wind erosion in nature is much faster than that of soil formation.

Reference answer: A

1. According to the information provided in the original text, the following inference is correct: ()

A. Sandstorms have brought benefits to New Zealand, Italy, France and other countries, so they will be used by human beings.

B. The wind blows the dust from the mainland to the ocean and the water vapor from the ocean to the mainland, which will gradually raise the sea level.

C. since human factors have aggravated the harm of sandstorms, human beings are fully capable of reducing the occurrence of such disasters.

D. Nature can't make mistakes, so human beings should conform to nature instead of trying to change it.

reference answer: c