Geography in the second year of junior high school is a small problem and urgent

1.Mohe County, Heilongjiang Province.

Mohe is the place with the longest days in summer and the shortest days in winter. When the winter solstice comes, the day in Mohe is only about seven hours; Around the summer solstice, the daytime of Mohe can be as long as 17 hours, and there is even a polar day phenomenon in which dawn and sunset appear in the sky at the same time. Every summer, thousands of tourists flock to Mohe's Arctic Village to watch the rare white nights and wait for the Northern Lights to appear.

2.(1) Temperature.

Since the amount of ice and snow melt is subject to the change of temperature, the flow and water level of the inland river have obvious seasonal changes. In the summer, when the temperature is high, the river water is more abundant, and after the summer, the river gradually decreases and the flow is stopped. So most of the inland rivers are seasonal rivers.

Precipitation is scarce, the climate is arid, the desert is widespread, the rivers lack sufficient water sources, and the melting water of alpine ice and snow has become the main water source of the inland rivers, so the temperature is the most important factor affecting the water volume of the inland rivers.

The largest inland river: the Tarim River, the river water comes from the Tianshan Mountains and the Kunlun Mountains, and July and September are the flood season.

2) Precipitation. The water level and flow of the outflow river and its seasonal variation are determined by precipitation, and the flood season and dry season alternate.

Yangtze River: The river with the most abundant water volume in China.

Pearl River: The longest river in China's flood season, formed by the confluence of the Xijiang, Beijiang and Dongjiang rivers, is smaller in length and basin area than the Yellow River, but the water volume is 7 times that of the Yellow River.

1.Mohe in Heilongjiang.

2.The main factor affecting the inland rivers is the meltwater due to the high mountain snow, and if the temperature is continuously cold, the water cannot melt, and the flood season of the inland rivers comes later. Therefore, most of the inland rivers are seasonal rivers.

The main factor influencing the outflow of rivers is the influence of the monsoon, and the precipitation brought by ridicule is the main factor affecting the amount of outflow rivers.

1, Heilongjiang.

2.[1] Precipitation.

2] Precipitation.

1. In winter and spring, it is the sowing season of some crops, and drought is formed when the precipitation is less, which affects the sowing of crops; The concentration of rains in summer and autumn is prone to flooding, which also affects the harvest of crops.

2. The change of grade will cause the difference of precipitation in other years, resulting in disasters (alternating drought and flood) and may also form secondary disasters.

Topographic factors, such as the plateau and mountainous areas in Northwest China, have large undulating terrain and inconvenient transportation, which is not suitable for large-scale settlement development.

Climatic factors, such as: the northwest region has a dry climate, a large temperature difference between winter and summer, little precipitation, and a relatively harsh natural environment.

Rivers, water source factors, such as: Northwest China has fewer rivers, scarce precipitation, and a general lack of water resources.

Others, such as the historical shift of China's economic center from the Yellow River basin to the Yangtze River basin, led to a large influx of people from the northwest to the southeast.

Answer: Topographic factors, such as: mainly plateau and mountainous areas, inconvenient transportation, insufficient arable land.

Climatic factors, such as temperate continental climate, and alpine plateau climate.

Rivers, water source factors, such as: fewer rivers, insufficient water sources.

Topographic factors: Mountains and plateaus are the main areas to the west and north of the first line of AB; The east is dominated by plains, such as the northwest: less precipitation and a cold climate; East: More precipitation, suitable climate.

Rivers, water source factors, such as: less West River, less water sources; There are many rivers in the east and abundant in water resources, and others, such as: the population of the west is historically small; Dondo.

In short, look at the description of the ladder in the book, it is all above!

Topography: There are many plateaus, mountains, hills, and mountainous areas, which bring certain difficulties to transportation and agricultural development.

Climate: It belongs to the arid region of Northwest China, with semi-arid and arid climate and low precipitation, which affects agricultural production and people's lives.

Rivers and water sources: many inland rivers and inland lakes have high salinity and are not convenient for direct drinking.

Others: vegetation is seriously damaged, many geological disasters, and people's education level is generally low.

Topographic factors, such as: the west and north are plateau mountains, far from the ocean, climate factors, such as the west and north of the plateau climate, and the air is dry, not suitable for human habitation of the river, water source factors, such as: the west and north of the inland area water source is limited, the river is almost an internal river, strong seasonality, others, such as: the west and north of the resources are relatively rich but the natural conditions are poor, development is difficult.

AB line is the Heihe-Tengchong line, also known as the Hu Huanyong line, topographic factors: the west of the line is mostly plateau desert area, the terrain is complex, the mountains are high and the valleys are deep, the traffic is inconvenient, and the coastal connection is inconvenient.

Climatic factors: The western part of the line is far away from the ocean, and the western Pacific monsoon is difficult to reach, so rainfall is scarce and the climate is arid, which is not conducive to agricultural development and production, and human daily life.

River water source factors: there are many high mountains and plateaus here, most of them are the source of rivers, and the water flow is turbulent, which is not conducive to navigation, so it is not conducive to people's communication.

Other: Historical factors: Due to the above factors, the history of this area was relatively late, the social progress was slow, and many dynasties did not govern the area, so the population was sparse.

Actually, my answer is no different. However, since the landlord's question mentions that he doesn't understand, it must not be that he doesn't know the answer, but that he doesn't understand.

Relative motion requires a reference, the first reference is obviously the river, relative to the river, the river flows down, people and boats are going upstream, so relative to the river, people are moving, boats are also moving, mountains are also moving; The second question refers to the ship of things, and imagines that standing on the boat, compared to the boat, people are naturally stationary, the river is moving, and the mountains are also moving.

Note: This movement is relative when it is at rest. It's not a movement of meaning in life.

For example, I'm standing still. However, this stationary defaults to the ground reference without emphasis. And I'm athletic relative to the person coming at me.

Here is the difference in reference. ）

The six empty spaces are, in order: moving. Kinetic. Kinetic. Kinetic. Kinetic. Stationary.

Moving, moving, stationary.

Moving, moving, stationary.

1: You can copy this book.

2: The Eurasian plate, the Indian Ocean plate, the Pacific plate and other plates squeezed and collided, resulting in frequent occurrences.

3:a4: The Indian peninsula is warm and humid, agriculture is developed, and the means of production and subsistence are easily available and suitable for human survival. Siberia is cold and dry, and it is difficult to obtain the means of production and subsistence, which is not suitable for human survival. 5：d

Four major plateaus: the Qinghai-Tibet Plateau; Inner mongolia; Loess plateau; Yunnan-Guizhou Plateau.

Four major basins: Tajia Shiqinglimu Basin; Qaidam Basin; pre-Jungar fidget basin; Sichuan basin.

Three Plains: Northeast Plain; North China Plain; The middle and lower reaches of the Yangtze River plain.

I'll give you a topographic map of China, I'll fill it in.

West: From north to south, Junggar Basin, Tarim Basin, Qaidam Basin, Qinghai-Tibet Plateau.

From the north to the south of the Inner Mongolia Plateau, the Loess Plateau, the Sichuan Basin, and the Yunnan-Guizhou Plateau.

East: From south to north, Northeast Plain, North China Plain.

Liaodong hills, Shandong hills, Heng hills, southeast hills.