Ask the geography master to explain, geography, ask the master to answer

The number of months is greater than 3 and less than 9 polar days, and this point is the North Pole where the sun shines directly on the Northern Hemisphere.

The number of months is greater than 3 and less than 9 on the polar night, and this point is the South Pole where the sun shines directly on the Southern Hemisphere.

If the polar night month is around January in the northern hemisphere winter, and the polar day month is around June in the summer of the northern hemisphere, then the point is within the Arctic circle of the northern hemisphere. Conversely, if the polar night month falls in the Northern Hemisphere summer i.e. around June, and the polar day month falls in the Northern Hemisphere winter i.e., around January, then the point is within the Southern Hemisphere Antarctic Circle.

In fact, as long as you remember the month of day and night at the North and South poles, you can do it.

aAnalysis: The equator is a circle of 360°

The distance from the North Pole to the equator is 90° 1 4 circles So it's 20cm Your question has been answered (Meow.

I'm very happy if I adopt it

The illuminated part of the earth is half of the whole sphere, the morning and dusk line is the boundary of this half, and the direct point is the ** of this half, so it is a20cm, please imagine it yourself.

Question 7 chooses a because the shadow of the flagpole only faces due east or west, which means that the sun rises due east and sets in the east on that day, which can only be the spring and autumn equinox, because if the sun shines directly on the northern hemisphere, the global sun rises northeast and sets northwest (except for the polar day and night), the sun shines directly on the southern hemisphere, and the global sun rises southeast and sets southwest, and the situation in the figure can only be direct to the equator. The noon shadow length of the place is 0, indicating that the place is on the equator. The longest shadows in a place during the day should be at sunrise and sunset, when the sun is at its most oblique.

Therefore, the place is sunrise at 7:20 Beijing time, and the equatorial sunrise time is 6 o'clock local time throughout the year, according to which it can be calculated that the place is 20° west of 120°E longitude, which is 100°E. To sum up, choose A.

Question 8 Option C According to the above question, the symmetry point of the ground should be 0°, 80°W, and the only one that meets this requirement is C, the Amazon estuary is near the equator, but the longitude is about 50°W.

Question 9 Option d There is no geostrophic deflection force at the equator, so no cyclone can be generated. Equatorial rainfall is basically convective rain.

PS: Go to bed early.

Is it still there? Learning so far?

Analysis] Plastic film will cause white pollution, harm crop roots, and have the effect of "heat preservation, moisturizing, and soil retention", which will hinder the migration of soil moisture. It is conducive to the increase of soil temperature and water retention.

Analysis] The easterly isotherm in the central part is densely distributed and closed, and is located in the Taiwan Mountains, so the main factor affecting the annual average temperature distribution in this region is topography.

Analysis】 The terrain is flat, located on the leeward slope of the summer monsoon in the Taiwan Mountains, and the annual precipitation is relatively low.

Analysis] Camphor trees are suitable for distribution in slopes and valleys with low altitude, gentle slope and good light conditions.

Analysis] When the cold current of California passes through the warm sea near California at the middle and low latitudes, the temperature decreases and the water vapor condenses to form sea fog.

Analysis] The strong wind is conducive to the dissipation of fog, and the Mediterranean climate zone is controlled by the subtropical high in summer, and the wind is small. In winter, it is controlled by the prevailing westerly winds and the winds are stronger.

Analysis] S City (San Francisco) has a Mediterranean climate, which is mainly controlled by the subtropical high in summer.

12. A Analysis] This question takes the fiscal policy implemented in China as the background, and takes the moderate fiscal deficit as the starting point to test students' understanding of the active fiscal policy. Fiscal deficit means that the country's fiscal expenditure is greater than fiscal revenue, and the state expands fiscal expenditure to form aggregate social demand in the market, thereby promoting economic growth and stimulating production. The reduction in the tax burden in item B is not the result of the fiscal deficit and is therefore excluded; Item c is not related to the topic and is discarded; Item D is incorrect, increasing the total social supply is to expand fiscal revenue, which is also inconsistent with the question, so the correct answer to this question is A

13、d。From the key information that "many network companies have also invested heavily in the research and development of smart phones, and the smart phones with built-in network products are introduced to the market", it can be seen that the purpose of network companies to produce mobile phones is to extend their industrial chain and improve their comprehensive competitiveness. Item A is absolute, the profit margin of the production of smartphones is not necessarily higher than that of other industries; Items b and c are not reflected in the material.

Figure 2 shows Taiwan.

Figure 3 is San Francisco, USA.

Paddy soil is mainly distributed in the plains and river valleys south of the Qinling-Huaihe River, especially in the middle and lower reaches of the Yangtze River. Maybe! Don't scold if you're wrong!

This sentence is correct, I guess it doesn't follow the question, so I didn't choose this answer.