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Wang Houxiong's complete interpretation is not bad.

Natural conditions are generally based on these aspects: topography, climate, hydrology, soil, vegetation, etc. But don't just stick to these aspects, but analyze specific problems.

In fact, for geography, the most important thing is to make full use of the existing information in the topic, and the most important thing is to learn to read the map, which is "the one who gets the map wins the world".

Topography: It is mainly located in the first step of China's topography Climate: focus on precipitation Hydrology: The river network is dense and short.

Soil is not important in this question and does not need to be used alone Vegetation: Mainly alpine grasslands, which is conducive to water conservation.

According to the map, it can be seen that the mountain is also the information implied in the title Therefore, it is located on the first step, and it is mainly supplied by melting snow in the high mountains.

Topography: It is located in the first echelon of high terrain in China.

The general idea of my answer to the question of natural conditions is: terrain, climate, light and heat, water source, soil, whether the land is open and flat, etc., and if it is suitable, it will be put in. It's just me personally--

Factors such as climate, precipitation, topography, rivers, pressure zones, and wind zones.

This content is actually a solar light map of a special date that needs to be memorized.

1. Judging from the counterclockwise rotation of the earth on the map, the hemisphere is the northern hemisphere, and point b is known to be 66 degrees 34 minutes north latitude, that is, the Arctic Circle. From the map, we can observe that on this day, the Arctic Circle and all latitudes north of it were observed to have a polar day, which can be inferred to be June 22.

2. Regarding the calculation of the local time in this problem, we usually have to grasp several special places implied in the diagram, such as the meridian time of the equinoxical day and night hemisphere at 12 o'clock and 0 o'clock respectively, and the meridian time at the intersection of the morning and dusk line and the equator are 6 o'clock and 18 o'clock respectively. Therefore, from the diagram, it can be seen that the meridian where point C is located is the bisector of the day hemisphere, that is, the local time is 12 o'clock, and the point B is located 45 degrees west of point C, and the local time is pushed for 3 hours, so it is 9 o'clock.

The above content needs to be memorized and skillfully applied, especially the light and shadow diagrams of the four special dates of the spring equinox, autumn equinox, summer solstice, and winter solstice must be mastered.

Mobile phone answers, ** some can't see clearly, the reasons are as follows

Because point b is on the Tropic of Capricorn, and the time of the polar day in the Northern Hemisphere is on the summer solstice, and the time of the summer solstice is June 22, so it is June 22

9 o'clock is determined by the morning and dusk line, and the equator equinoxes day and night throughout the year, so it is always sunrise at 6 a.m. and sunset at 18 p.m. according to the direction of the earth's rotation

Then the meridian on the earth divides the earth into 8 parts, one part is 3 hours, so the arrow is 3 hours different from point b, and the time of the same longitude is the same, so it is judged that point b is 9 o'clock

Big brother, you're really good... This is also taken out and pasted.。。。

Because it takes time for ships to sail in formation, there is no doubt that the days from East Sanya to the Strait of Malacca have become longer.

As for the course after that, the days also become longer because:

First of all, from the perspective of time, shortly after the winter solstice in the Northern Hemisphere, the days in the white hemisphere become longer, and close to perihelion, the speed of the Earth's rotation around the sun is faster, and the speed of the northern hemisphere day becomes longer is also accelerated.

Second, because of the voyage at the lower latitudes of the Indian Ocean, although it is a slight voyage to the higher latitudes, the speed of the axis shortening (a) brought about by the voyage to the high latitudes of the Northern Hemisphere is offset by the speed of the daytime change in the Northern Hemisphere (b) due to the faster rotation of the Earth near perihelion, and the speed a is less than the velocity b.

The above may explain the answer.