Ask for advice on geographical problems and seek detailed explanations of geographical problems

Hello, choose A, there are two steps in judgment, 1) Because the building in the picture is in the Northern Hemisphere, the shadow of A is the longest, and when the direct point is far away from the Tropic of Cancer, the direct angle of the sun is small, so it is winter in the Northern Hemisphere; Ding's shadow is the shortest, the direct sun is close to the Tropic of Capricorn, and the direct angle of the sun is large, so it is summer in the northern hemisphere.

2) The southern hemisphere happens to be summer in the northern hemisphere in winter, and the higher the latitude of the southern hemisphere, the longer the daylight hours, which is just conducive to the scientific expedition team to investigate the Antarctic region in detail.

Hope it helps.

It is best to choose summer for Antarctic expeditions, the summer in the southern hemisphere is the winter in the northern hemisphere, and the sun is in the southern hemisphere in winter, so the shadow of buildings in the northern hemisphere is long. So choose A

The shadow of the nail is the longest, indicating that it is winter in the Northern Hemisphere. And this happens to be summer in the Southern Hemisphere.

Antarctica has a cold climate, and only summer is suitable for expeditions.

Expeditions to the Antarctic are best visited during the winter months in the Northern Hemisphere, when the Northern Hemisphere has the longest shadow length.

At this time, the sun is far away from the northern hemisphere, so the shadow will grow, (our country belongs to the northern part of the eastern hemisphere), so at this time, the south pole is closer to the sun, and it is a little warmer than other periods. You can do this, look at the globe, it's a little tilted, take a ping-pong ball as the sun, the earth revolves around the sun, and it will rotate at the same time. So you can understand it better.

1. In the summer half of the Southern Hemisphere, then, it is the time between the autumn equinox and the spring equinox, when the sun shines directly on the Southern Hemisphere. The only of the four options is B and D (obviously choose B, on the 15th of the month, the sun will almost reach the equator). If the latitude of point p is 71°, then the tangent point between the morning and dusk line (circle) and the southern hemisphere is 71°s.

So, the sun shines directly at 19°s (with 71° interludes). It takes about 4 days for the Sun to move 1° between the Tropic of Capricorn. Do your own rough calculations and choose B.

2. The longitude of point P is 30°E, if in 1, P is the tangent point of the morning and dusk line (circle) and the latitude line, then the point of P is either 0 or 12 o'clock. 30°E is 0 or 12 o'clock, and Beijing time is 6 or 18 o'clock. Choose A.

3. A and P are the tangent points of the morning and dusk lines (circles) and the latitude line, and the M point is the pole, so MP is the shortest. b, p, and o are all on the morning and dusk line, and the solar altitude angle is 0, that is, the sun rises at the same time. c. Between two points, the shortest line segment, and Po is the shortest distance between P and O points (note that in this question, A represents the morning and dusk line, not the latitude line, if it is the latitude line, it is not).

d. The height of the Sun at noon is equal at the same latitude or at the same latitude from the parallel line of direct sunlight. The latitude of point P is higher than point O, so the height of the sun at noon point o is greater than point p. Choose C.

1.First of all, AC is excluded, because the title has already been said to be the summer half year of the southern hemisphere, and the first time must be from the following year; Secondly, it is certain that there is a polar day phenomenon in the Southern Hemisphere, and the polar day phenomenon will occur within the A-line. Finally, rule out D.

It's better to say so. On December 22, the sun shines directly on the Tropic of Capricorn, and all the polar days within the Antarctic Circle, and on March 21 of the following year, the sun shines directly on the equator, and the global day and night are of equal length, so it is 9 + 31 + 28 (29) + 21 days that move 23 ° 26 minutes, excluding d

1.The summer half year of the Southern Hemisphere is 9,23—, at this time, the sun directly hits the Southern Hemisphere, and there is a polar day in the Antarctic Circle, because point P is the highest latitude on the A line, indicating that from 71 degrees south latitude to 90 degrees south latitude is the polar day, when the direct sun point moves from the equator to the Tropic of Capricorn, the polar day range in the Antarctic Circle expands, and when the sun is in a straight line of the Tropic of Capricorn, the Antarctic Circle is daylight, so the time at this time is probably later, before March 21, so choose B

2.If M is the North Pole, then Beijing is in the east of P, and the temperature is highest at the meridian where 0 is located at this time, indicating that the local time of 0 is 12 o'clock at this time, and the longitude of Beijing is.

120e, 6 hours different from 30e, and 0 is located in the west of point p, so the time difference between Beijing and 0 is greater than 6 hours.

time, so the time in Beijing is greater than 18 o'clock at this time. When M is the South Pole, 0:00 and Beijing are on the same side of P, so the difference between local time is less than 6 hours, and Beijing time is less than 18:00. So choose B, that is, Beijing time is 20 o'clock.

The longitude of Beijing is 120e, and the time difference = the difference in longitude is 15).

3. First of all, p and 0 are not located on the same latitude, so the solar altitude angle of the two places cannot be the same, excluding d. Secondly, the figure shows that lpml <|om|, excluding a. In the end, it is not known whether the m channel low is the North Pole or the South Pole, and it is impossible to determine which one sees the sunrise, excluding B.

So choose. c (the shortest line segment between two points).

Question 1: He said that it is the summer half of the southern hemisphere, so exclude a and c; If the P point is at 71 degrees, it means that the P point is in the polar circle and intersects with the A point, which means that the sun has made a return movement to the north at this time, indicating that it is after the winter solstice, then B should be chosen.

Question 2: No,,, you need to consider whether M is the North Pole or the South Pole, then, point P is probably in Europe, or Africa, and it is difficult to analyze the relationship between point O and the morning and dusk line).

Question 3: Choose C; By elimination, a is wrong because the distance from the pole at the same latitude is equal; b is wrong because m may be the south pole or the north pole, if you are the south pole, then o will rise first, if it is the north pole, then p will rise first; d is also wrong because it is not certain whether it is the same latitude;