Geography Social Please answer in detail, thank you 7 13 50 1

bSecond Tier.

The Sichuan Basin is located in the eastern part of Sichuan Province in the upper reaches of the Yangtze River, surrounded by mountains and plateaus with an altitude of 2000 to 3000 meters, with Daba Mountain, Micang Mountain and Longmen Mountain in the north, Qionglai Mountain and Daliang Mountain on the edge of the Qinghai-Tibet Plateau in the west, Da Lou Mountain in the south and Wushan Mountain in the east. No matter from the perspective of structure or human landform, the Sichuan Basin is a typical basin. It has been a relatively stable large-scale depression area of the earth's crust since the Sinian period.

It became an inland lake basin during the Indosinian movement of the Late Triassic, but it was much larger than the Sichuan Basin today, and it was also called the "Red Basin" or "Purple Basin" because of the 3,000 4,000 m thick purple-red sandstone and shale in the Mesozoic Era. The Sichuan movement at the end of the Mesozoic Era caused the basin to fold into mountains and sink in the middle, and the outline of the Sichuan Basin was basically formed, and the internal strata of the basin were also deformed on a large scale. A group of north-east-trending folds appeared in the eastern part of the country, which was called the basin east fold belt. The central part forms a vault structure, which is called the vault belt in the basin; The western part manifested itself as subsidence, becoming a basin subsidence zone, which laid the foundation for the three geomorphological zones of today's basin.

The Cenozoic Himalayan movement caused the surrounding mountains to rise again, the basin to sink again, and the Chengdu area to sink deeper. At the same time, the Yangtze River cut through Wushan and flowed eastward, completing a unified Yangtze River water system and transforming the inflow basin into an outflow basin.

The Sichuan Basin is the largest outflow basin in China, with an area of more than 100,000 square kilometers. The internal hills and plains of the basin are staggered, and the terrain is high in the north and low in the south. Due to the different surface morphology, it can be divided into three parts with Huaying Mountain and Longquan Mountain as the boundary

To the east of Huaying Mountain, there is roughly parallel Sichuan Dongling Valley, which is composed of many strip-shaped mountains in the northeast-southwest direction, with an altitude of 700 800 meters, and many low hills and flat dams in the valley, with an altitude of 200 500 meters, which is the place where agriculture and population are concentrated in eastern Sichuan. Between Huaying Mountain and Longquan Mountain is a square hill. Due to the gentle inclination of the purple-red sand shale in the area, a large area of square mountain-like hills is formed after cutting.

The altitude is 350 450 meters, and the relative height is tens of meters. The local working people took advantage of the deep soil layer of Fangshan Hill and built the terraced fields all the way to the top of the mountain. To the west of Longquan Mountain is the plain.

Known as the West Sichuan Plain or Chengdu Plain, with an area of more than 6,000 square kilometers, it is the largest plain in the Sichuan Basin and the largest plain in the southwest region, with an altitude of about 600 meters. The famous Dujiangyan water conservancy project has made the plain self-irrigated, with a warm climate and fertile soil, and it has been developed earlier, becoming the "land of abundance" with thousands of miles of fertile fields.

Select B Tier 2.

The first tier mainly includes the Qinghai-Tibet Plateau.

Clause. 1. The boundary of the second stage is the Kunlun Mountains-Qilian Mountains-Hengduan Mountains.

The second tier mainly includes the Tarim Basin, the Junggar Basin, the Inner Mongolia Plateau, the Loess Plateau, the Sichuan Basin, and the Yunnan-Guizhou Plateau.

Clause. 2. The general demarcation of the third ladder is as follows: Daxing'an Mountains-Dahang Mountain-Wushan-Helan Mountain, and the third ladder mainly includes the Northeast Plain, the North China Plain, the Middle and Lower Yangtze River Plain, the Southeast Hills, the Shandong Hills, and the Liaodong Hills.

b The Sichuan Basin is located to the east of the Qinghai-Tibet Plateau of the first tier, and to the west of Wushan, the boundary line of the second and third tiers, and therefore belongs to the second tier.

The second tier, west of the Hengduan Mountains, is the first tier.

b Take a look at the geography book from grade 8 and see it on the map

You are right.

The correct answer is: between 0-200 meters.

According to the contour distance is 100 meters, it can be seen: 600 meters above sea level at the top of Mount A 700 meters, 500 meters at the top of Mount B at 600 meters above sea level;

Cross-subtraction - that is, the high value of the higher altitude of the first altitude is used to subtract the low value of the second altitude, and the low value of the first altitude is subtracted from the high value of the second altitude, that is.

600 600 Relative height of the top of Peak A and Peak B 700 500 m 0 Relative height of Peak A and Peak B 200

Answer: Between 0-200 meters.

You're right.

A is greater than 600m and less than 700m; Site B is greater than 500m and less than 600m. Cross-subtract, relative elevation between 0-200 meters.

100-200 meters is correct.

First of all, you need to understand what relative height is, and you can understand.

The answer is correct, you are wrong, see clearly that the question is to ask for the relative height, which is equivalent to saying how many meters is higher than the top of Mountain B.

What about the law and shape of the upper and lower quarter moon to change the hole finger?

First, there are two situations for the time judgment method.

The first is to determine the phase of the moon with the help of the date.

On the night of January last year, the flower market was lit up like day. The willow tops on the moon, people about after dusk. ”

Students can start with the "Verification and Matching Night" and find out that the time referred to is the fifteenth day of the first month, and then it can be judged to be a full moon.

The second is based on the timing of the appearance of a particular moon phase.

Looking for an old carving insect with a sentence, Xiaoyue hung a jade bow on the curtain. I don't see the sea every year, where the article cries the autumn wind. ”

"Dawn moon" refers to the moon phase at dawn, the moon phase is shaped like a jade bow, and this month is the last quarter moon.

Moonrise at midnight. The moon sets at noon).

The moon is falling and the sky is full of frost, and Jiang Feng is sleeping. Hanshan Temple outside the city of Gusu, the bell rings in the middle of the night to the passenger ship. ”

From the poem, it can be seen that the moon sets on the night, and the moon corresponds to the first quarter moon (moonrise at noon, the moon sets at midnight).

People are idle and osmanthus falls, and the night is quiet and the spring mountain is empty. The moonrise frightens the mountain birds, and the spring stream sings.

In the poem, the night is quiet and the moon rises, when it is the last quarter moon.

The moon rises in the middle of the night, and the moon sets at noon).

Second, judging by the brightness of the moon phase.

The moon black geese fly high, and they flee only in the night shield. If you want to chase away the light horsemen, the snow is full of bows and knives.

The moon is black and there is no moon, and the moon is quite a new moon.

The moon is frightening, and the birds are uncertain, and they will miss the golden ox. Arouse the two eyes to be clear and bright, and the tears fall on the red cotton cold.

The moon is a bright moon, which can be referred to as a full moon.

Third, judging by the shape of the moon phase.

The willow bank, the wind and the waning moon.

The waning moon refers to the Elder Eyebrow Moon, and the dawn refers to the Dawn Moon, which refers to the Elder Eyebrow Moon at the end of the month.

Xiao shuddered and destroyed the moon as a curtain to hang a jade bow.

The shape of the jade bow refers to one of the upper and lower quarter moons, and according to the "dawn time", the "jade bow" is judged to be the second quarter moon.

Fourth, it is judged according to the position of the moon phase and the direction of the moon surface.

1.How does the high and low terrain in Asia affect its climate?

Answer: The high and low terrain in the middle of Asia has made it impossible for ocean water vapor to penetrate deep into the interior, resulting in widespread drought in Central Asia and widespread desert Gobi.

2.There are those ethnic groups in Asia that have deep contradictions and constant conflicts.

Answer: There are many ethnic groups in Asia that have deep contradictions with each other for many reasons, such as religious beliefs, territorial disputes, and modern wars are the main factors of contradictions. For example, the religious and cultural struggle between India and Pakistan, the modern war between China and Japan, the territorial dispute between China and India, and so on.

3.Russia and Japan have different land sizes and resource reserves.

A: Russia is the largest country in the world in terms of area and one of the few countries that can be self-sufficient without relying on imported raw materials, and is very rich in mineral resources; Japan is an island country with few mineral resources and is largely dependent on imports.

4.The Middle East has long been the focus of fierce contention among Western powers, but please name at least two for many reasons.

Answer: (1) The Middle East is rich in oil and gas resources, and if it wins the Middle East, it will be stuck in the lifeblood of the world economy;

2) The strategic position of the Middle East is very important, located at the junction of Asia, Africa and Europe, and has always been a battleground for soldiers;

3) The Middle East is dominated by Muslims who profess Islam, but also has Israel that believes in Judaism, and the relationship is complicated, which is also conducive to the intervention of Western powers in the political affairs of the region. Please adopt.

The answer is reversed, and it should be the angle between the equator and the table, where the table corresponds to the ecliptic plane in the actual observation system.

The answer is wrong, it's the other way around.

The orbital plane on the globe is parallel to the tabletop, the angle between the earth's axis and the orbital plane is, and the earth's axis is perpendicular to the equatorial plane, so the angle between the equator and the orbital plane is.