What are these three areas in the field?

<>1. China's nine major commercial grain bases: Sanjiang Plain (the highest commodity rate), Songnen Plain (corn), Jianghuai region, Taihu Lake Plain, Poyang Lake Plain, Jianghan Plain, Dongting Lake Plain (serious land reclamation), Chengdu Plain, Pearl River Delta (mixed agriculture, mulberry fish pond).

2. The basis for the establishment of a commercial grain base in China is as follows:

1) The terrain is flat, the soil is fertile, the water, light and heat are sufficient, the transportation is convenient, and the grain production is suitable for large-scale;

2) There is a large surplus of grain production that can be used as commercial grain.

3) Natural causes: topography, climate, hydrology, soil, vegetation.

4) Human reasons: transportation, market, raw materials, policy, labor, mechanization (degree of industrialization).

Although the North China Plain is flat and the soil layer is deep, it is densely populated and, more importantly, severely short of water. At present, there are fewer and fewer surface rivers in North China, and almost all of the industry, agriculture and people's livelihood depend on pumping groundwater, and the North China Plain has formed a groundwater funnel with an average depth of 120 meters, which does not have the key conditions for establishing a commercial grain base (grain production is only enough to meet its own needs). The North China Plain is only one of China's cotton bases.

3. The economic development of agriculture, including other industries, is dynamic and affected by comprehensive factors such as economic development, ecological environment, and policy environment. The above is only traditionally said. As a matter of fact, many of the "nine bases" have seriously declined in status or even fail to live up to their name.

For example, due to the rapid development of industrialization and urbanization, the rapid increase in population, and the deterioration of ecology in the Pearl River Delta region, the traditional commercial grain production base no longer exists.

Is it called "China's main grain producing area"?

Three major industrial bases: Liaoning Central South (mainly heavy industry, in Northeast China), Beijing-Tianjin-Tang (North China), Shanghai-Nanjing-Hangzhou (middle and lower reaches of the Yangtze River).

Commercial grain base: Northeast China (Sanjiang Plain, Songnen Plain), middle and lower reaches of the Yangtze River (Hanjiang River Plain, Poyang Lake Plain, Dongting Lake Plain, Jianghuai Plain, Taihu Lake Plain, Chengdu Plain), Liangguang Hills (Pearl River Sanjiang Plain).

It refers to the three major industrial bases.

1. Of: particles, used at the end of sentences, to express an affirmative tone, often used in prepositional phrases, to express the result of a description, usually used after nouns and adjectives, such as: my watch, hard-working people, smart children.

2. Place: Structural particle, used after a word or phrase to indicate the predicate that modifies the back, often used in verb-object phrases, but also a kind of descriptive consequence, usually used after nouns, verbs, adjectives, such as: walk slowly, work intensely, and study seriously.

3. De: It is used after the verb to express the possibility, often appears in the verb complement phrase, indicating a state, a result, usually used after the verb, as a verb complement adverbial. If you can't, you can put it down, and wait until the flowers are gone.

In the written language, it should be written as three different words, write "of" after the adjective, write "ground" after the adverbial, and write "de" in front of the complement.

4. "of" is followed by nouns, such as: his mother, my clothes, clear river, long hair.

Example sentence: Your handwriting is small, and then enlarge it a little.

Your parents are coming, please wait for the good news.

Everyone has to arrange their work according to their abilities and let them have their own place.

Everything shows their patience and thoughtfulness.

In the morning, my mother gently called my name and woke me up.

Without your help, I wouldn't have succeeded.

5. "Ground" is preceded by words that indicate action, such as: gently, slowly, quickly, and forcefully.

Example sentence: Youth is to run hard and then fall gorgeously.

A little boy was playing football in the street, and he kicked the ball in hard.

The willow branches were blown by the spring breeze and swayed gently.

Bright sunlight gently shone on the grassland.

The fish in the pond gently spit out a series of small foams.

6. "De" is preceded by a verb and followed by an adjective, such as: sweep very clean, smile so sweetly, and have a good time.

Example sentence: Today's street is cleaned.

was praised, and the children smiled so sweetly.

I've had a great time here.

When he heard the news, he jumped three feet high with joy.

He was so sad that he began to cry.

<> slowly, seriously, hard, positively, slowly.

The pronunciation [de] indicates the voice of the particle.

1. Slowly, [màn màn de].

She saw some people in front of her who looked improper, so she slowly walked into the alley.

2. Seriously [rèn zhēn de].

He looked serious, like a roadside filmmaker.

3. Bump round 搏 diligently [nǔ lì de].

Try to live the life you want.

4. Actively [jī jí de].

In his studies, he has been actively working hard.

5. Slowly地 [huǎn màn de].

Seeing her father walking slowly, her tears suddenly fell.

A region usually refers to a large geographical area, including two categories: geographical area and administrative geographical area. It also refers to disputed areas, such as Kashmir. In terms of traditional geographical areas, it refers to a large regional scope, such as coastal areas, desert areas, mainland areas (i.e. Chinese mainland), southwest regions, etc.

In terms of the significance of administrative geographical regions, including special political regions and administrative regions. In China, there are two types of administrative regions: prefecture-level and township-level.

Chinese name: Region.

Scope: Geographic and administrative.

Geographic Region: A large regional extent.

Administrative and geographical regions: prefecture level and township level.