There are still 5 days to go before the college entrance examination, and geography has no foundation at all. Please ask for the help of experts and reward them with high marks! ! Answer the extra poi

There are still 5 days to go before the college entrance examination, and geography has no foundation at all. Please ask for the help of experts and reward them with high marks! ! Answer the extra points ~ Learn by heart

1. Boundary between continents:

(1) Boundary between Asia and Europe: Urals, ural river, Caucasus and Turkish Strait.

(2) The dividing line between Asia and Africa: Suez Canal, Red Sea and Mande Strait.

(3) The dividing line between North and South America: Panama Canal.

(4) The dividing line between Europe and Africa: the Strait of Gibraltar and the Mediterranean Sea.

(5) The dividing line between Asia and North America: Bering Strait.

(6) The boundary between South America and Antarctica: Drake Strait.

(7) The dividing line between Europe and North America: the Danish Strait.

2. World ocean boundary:

(1) The boundary between the Pacific Ocean and the Arctic Ocean: Bering Strait, that is, the connection line between Cape Kligugong of Chukchi Peninsula and Cape York of Seward Peninsula.

(2) the boundary between the Pacific Ocean and the Atlantic Ocean: the meridian passing through Cape Horn is the line from Tierra del Fuego along the western end of the Drake Strait to Cape Charles.

(3) The boundary between the Pacific Ocean and the Indian Ocean: along the northern end of the Straits of Malacca, the west coast of Sumatra, the south coast of Java, the south coast of new guinea (Irian Island), the mainland of Australia, bass strait and Tasmania, and then roughly along the line of 146 52' E to the South Pole.

(4) The boundary between the Atlantic Ocean and the Indian Ocean: the meridian (2 degrees east longitude) passing through the southern tip of Africa-Cape Agules.

3. The boundary of China's population density:

It is roughly along the Heihe River in Heilongjiang-Tengchong in Yunnan. The line is densely populated in the southeast and sparsely populated in the northwest.

4. Terrain ladder boundary in China:

First and second ladder boundary: the eastern end of Kunlun Mountain, Qilian Mountain and Hengduan Mountain.

The second and third step boundaries: Daxing 'anling, Taihang Mountain, Wushan Mountain and Xuefeng Mountain.

5. Climate boundary in China:

(1) Boundary between monsoon region and non-monsoon region: Daxinganling, Yinshan, Helan, bayan har and Gangdise Mountains. The northwest of the line is a non-monsoon area, and the southeast is a monsoon area.

(2) Boundary between precipitation and dry-wet area

Boundary between wet area and semi-wet area (8 mm isoprecipitation line): generally along the southeast edge of the Qinghai-Tibet Plateau, eastward passing through the Qinling-Huaihe line.

the boundary between semi-humid area and semi-arid area (4 mm isoprecipitation line): from Daxing 'anling to southwest, passing through Zhangjiakou, Lanzhou and Lhasa, to the southern slope of Himalayas.

The boundary between semi-arid area and arid area (2mm isoprecipitation line): Yinshan Mountain, Helan Mountain, Qilian Mountain, bayan har and Gangdise Mountain.

(3) heat boundary

January ℃ isotherm (boundary between subtropical zone and warm temperate zone): the southeast edge of Qinghai-Tibet Plateau-Qinling-Huaihe line.

the boundary between the warm temperate zone and the middle temperate zone: the Yalu River estuary-the Great Wall (slightly south of Shanxi)-Qilian Mountain-Tianshan Mountain.

6. The dividing line of China's annual solar radiation is rich and poor:

From Daxinganling to the southwest, passing through the west side of Beijing, Lanzhou and Kunming, and then turning north to the south of Tibet. The northwest of this line is rich in solar energy resources, while the southeast of this line is poor.

7. Boundary of China's four major sea areas:

Boundary between Bohai Sea and Yellow Sea: Laotieshan Cape in Liaodong Peninsula-Penglai Cape in Shandong Peninsula;

The boundary between the Yellow Sea and the East China Sea: Qidong corner on the north bank of the Yangtze River estuary-southwest corner of Jeju Island;

The boundary between the East China Sea and the South China Sea: Taiwan Province Island, Nan 'ao Island, Guangdong Province.

8. Hydrological boundary in China:

(1) Boundary between inflow area and outflow area:

Northern section: the eastern end of Daxinganling, Yinshan, Helan and Qilian Mountains

Southern section: 2mm isoprecipitation line.

(2) The boundary between the Yangtze River and the Yellow River: bayan har and Qinling Mountains.

(3) The boundary between the Yangtze River and the Pearl River system: Nanling.

(4) The watershed between the Pacific water system and the Indian Ocean water system (Lancang River and Nujiang River): Nushan Mountain.

9. The boundary between the three natural regions in China:

(1) The boundary between the eastern monsoon region and the arid and semi-arid region in the northwest: the 4 mm precipitation isoline is from Daxinganling to the southwest, passing through Zhangjiakou, Lanzhou and Lhasa, and reaching the southern foot of the Himalayas.

(2) The boundary between the eastern monsoon region and the Qinghai-Tibet alpine region: 3m contour.

(3) The boundary between the northwest arid and semi-arid area and the Qinghai-Tibet alpine area: Kunlun Mountain-Altun Mountain-Qilian Mountain.

1. The boundary between the four natural areas in the monsoon region of eastern China:

(1) The boundary between the humid and semi-humid areas in the temperate zone of Northeast China and the humid and semi-humid areas in the warm temperate zone of North China: the daily average temperature is greater than or equal to 1°C and the accumulated temperature is 32°C isoline.

(2) The boundary between the subtropical humid area in Central China and the humid and semi-humid area in the warm temperate zone in North China: the isoline of daily average temperature greater than or equal to 1℃ and accumulated temperature of 45 C. That is, the Qinling-Huaihe line.

(3) The boundary between the subtropical humid area in Central China and the tropical humid area in South China: the isoline of daily average temperature greater than or equal to 1℃ and accumulated temperature of 75℃.

11. The boundary between the two natural areas in the arid and semi-arid areas of northwest China:

Helan Mountain area, which is equivalent to the annual precipitation line of 2mm.

12. China's comprehensive geographical boundary:

The Qinling-Huaihe line is an important geographical boundary in China. It is the dividing line between subtropical zone and warm temperate zone, the coldest average monthly temperature of C isotherm, the accumulated temperature of 1°C or more and 45°C, the precipitation line of 8 mm, the dividing line between humid zone and semi-humid zone, the dividing line between rivers with or without ice period, the dividing line between temperate deciduous broad-leaved forest and subtropical evergreen broad-leaved forest, the dividing line between calcareous soil and acidic soil such as red soil, the dividing line between wheat and rice, the dividing line between agricultural dry land and paddy field, The dividing line between crops harvested once a year or thrice every two years and twice a year or thrice a year, the dividing line between relatively complete terrain (mainly plains and plateaus) and relatively broken terrain (mainly basins and low hills), the length of river flood season, the number of rivers, etc.