Physical geography selection for a detailed explanation, O O thank you

The west side of M and N is oceanic, and N is affected by westerly winds all year round—it has a temperate oceanic climate, and is on the west coast of the continent at 40 60 degrees north latitude; m is seasonally influenced by westerly winds - it has a Mediterranean climate, on the west coast of the continent at 30 to 40 degrees south latitude.

1 When m was under the influence of a westerly wind, the following statement is true: a

a The southwest monsoon prevailed in South Asia at this time.

b The value of isotherm A is less than the value of B.

c At this time, the m ground is controlled by the sub-high.

d At this time, the Icelandic low pressure was strong.

When m is affected by westerly winds, m (southern hemisphere) is winter, northern hemisphere is summer, and the southwest monsoon prevails in South Asia – a pair.

The temperature in the southern hemisphere decreases from north to south, and the value of isotherm A is greater than that of B, and B is wrong.

The question stem has said that when M is affected by westerly winds, M (Southern Hemisphere) is winter, and M is controlled by the subtropical high in Southern Hemisphere summer, C is wrong.

At this time, the ocean in the northern hemisphere is high pressure, the continent is low pressure, the Asian low pressure is strong on the Eurasian continent, and the Azorean high pressure in the Atlantic Ocean is strong.

Answer: a At this time, the southwest monsoon prevailed in South Asia.

The wind direction near the ground in 2 n is: d

a Northeast wind.

b Southeasterly.

cNorthwest winds. d Southwesterly wind.

n is located on the west coast of the continent at 40 60 degrees north latitude, and is affected by westerly winds all year round - southwest in the northern hemisphere and northwest in the southern hemisphere.

Answer: d Southwest wind.

Hello lz.

October 22 is 30 days later than the autumnal equinox.

April 22 is 30 days later than the vernal equinox.

Both the spring and autumn equinoxes are 12 hours long.

It is assumed that the daily variation of day length is uniform (not really, because there is a perihelion perihelion problem, and the curve is actually close to sinusoidal).

Then the decrease in day length 30 days later than the autumnal equinox is equal to the increase in day length 30 days later than the spring equinox, that is, the day length on October 22 is 12-t

On April 22, the day length was 12+t

Add up ......24～

Let's take a look at the diagram below.

For any place on earth, the length of day and night must be equal to 24 hours on the same day.

In terms of the seasons, the length of the day in any part of the equinox is equal to the length of the night, 12 hours each. On the second solstice, the day length on the winter solstice must be equal to the night length on the summer solstice, and vice versa. This is caused by the tilt of the Earth's axis of rotation and the Earth's revolution.

When it is neither a solstice nor a equinox, there must be two days of the same day as the length of the night on the other day, because the direct point of the sun oscillates back and forth between the Tropic of Cancer on the surface of the year, and the two days when the earth is in a relative position on the orbit of the sun, separated by two sides of the sun, with a time difference of exactly half a year. For example, if October 22 is about a month after the autumnal equinox, and the length of the day is 11 hours and 13 minutes, then when the Earth moves to the other side of its orbit and the time difference is half a year, the length of the night in that place is also 11 hours and 13 minutes. The day is October 22 plus (or minus) about 183 days.

183 days is equivalent to 6 months, and October 22 plus (or subtract) 6 months is around April 22.

However, in half a year, the direct sun point moved at an angle of 23 degrees 26 minutes, and the direct sun point in the question moved at 31 degrees 14 minutes, minus 23 degrees 26 minutes, which was 7 degrees 48 minutes. But this 7 degrees 48 minutes is the degree in which the sun moves south and then back to the north, which actually needs to be multiplied by 2, that is, it has moved about degrees. If the speed of movement of the direct point of the sun is about 1 degree in 4 days, then the movement takes days, which is about 2 months.

April 22 plus 2 months, about June 22. So choose D.

This place is a certain place in our country.

Look at the length of the day and the angle of the sun's elevation to know that the day is the summer half year, because the day length is 12 hours, March 21 to September 23 is the summer half of the year, from the equinox of day and night to the length of the day and the short of the night to the equinox, the day length of the place is 12 hours and the h is more than 70 degrees, which is the summer half of the northern hemisphere

This map is located in the western region of China, and is located in the northwest of Yinchuan, which can be judged to be Helan Mountain. Helan Mountain is the dividing line between the monsoon area and the non-monsoon area, and it can be seen that the Q area is located in the non-monsoon area and the P area is located in the monsoon area, so the P area is greatly affected by the summer monsoon and is located on the windward slope of the summer monsoon with more precipitation. Right.

The air is humid, and the east of the P is the Ningxia Plain, which is far away from the sand source, and the Q is located in the desert, and the number of sandstorm days in Q is wrong due to the strong northwest wind.

Q is located on the windward slope of the northwest wind, and P is located on the leeward slope of the northwest wind, so the number of windy days in P is less.

The air in the plutonium is humid and prone to snowfall. Q is located in a desert area, the air is drier, and it is not easy to form snowfall. The humidity of the air is one of the conditions that determines the amount of snowfall. Wrong.

The leeward slope of the AP land has a lot of precipitation per year.

The plutonium is located in a river valley with little windy weather.

Q is located in a desert, the climate is arid and there is little precipitation, and it is located on the path of the winter equinox, with windy weather.

Simple! First of all, A and C are equal to height, and B and D are equal to height. According to the isotherms, the temperature of C and D is higher than that of A and B, respectively.

It shows that C and D are located on the sunny side of the mountain, and A and B are located on the shaded side. According to the law of the northern hemisphere "the south of the mountain and the water is the yang in the north", it can be judged that it is the northern hemisphere.

Question 9: The height difference between A and B is 500 meters, and for every 100 meters of ascent, B is 3 degrees lower than A, and the position of A contour is about 11 meters lower than A, so the height difference between A and B is about 600 meters, a difference of degrees. A is 12 degrees, then B should be about degrees, so choose B.

If you add my points, I will help you in the future, you look at you, I won't give any points!

Question 21: There is no polar day and night in the Arctic region, and the range of day and night is half and half, so it may be a spring equinox or an autumnal equinox, choose a and c

22 questions, 60°W is located in the dusk line of the morning and dusk line, the time is 18 o'clock, according to the longitude difference of 15°, the time difference is one hour, the time difference of 150°W is 12 o'clock, the 0° meridian is 22 o'clock, Beijing (120°E) is 6 o'clock, just at sunrise. Select A, C

Question 21: ac

Question 22: ac

The day and night line equinox the North Pole, indicating that it is the spring or autumn equinox; The western hemisphere is in day and night, and the eastern hemisphere is in daytime, according to the law of the earth's rotation "from west to east", it can be inferred that Beijing is at sunrise time, and at the spring and autumn equinox, the sunrise time in Beijing (East Eighth District) is 6 o'clock, and the time of 15°W is 12 o'clock.

In fact, the diagram of this question is the b in the sun's return movement ** (below), then its previous state should be a, and it can be judged that a represents the summer solstice according to the light of the direct point of the sun, then b is the autumn equinox. So the answer is C

1. The figure of Beijing at noon is getting longer and longer, which means that the direct point of the sun is moving to the south, so choose the answer in c and d (after September 23, the sun begins to shine directly in the southern hemisphere). Mn is the equator, then the principle of going up north and going south, left west and right east, the dividing line between the eastern and western hemispheres is 20°W, 160°E, then, the longitude where m is located is 160°E, and N is 20°W (along the direction of the earth's rotation, from M to N is the Western Hemisphere). The side we see is the night hemisphere, so the middle meridian is at 0 o'clock, 160°E to 20°W eastward, and the middle meridian is 110°W (draw a few vertical lines to indicate the meridians, push them yourself).

So, when 110°W is 0, it will be 15:20 in Beijing. Well, D is right.

2. M and N are two opposite meridians, and the two sides are at different times, so these two lines are two daily lines. So, illustrate, one of them is a 180° meridian and the other is a meridian at 0 in local time, because they are two opposite meridians, then a meridian at 0 in local time is a 0° meridian. Then, the 0° meridian is 0 o'clock, and Beijing is 8 o'clock.

B is right.

Question 1. This question is a two-step process.

Step 1: The figure is a side view of the earth, and MN is the equator, and this side is the night hemisphere, it can be seen that the earth is in the spring and autumn equinoxes at this time, because only on the spring and autumn equinoxes, the upper and lower endpoints of the morning and dusk lines are just at the north and south poles, and the earth is equinox. Let's look at the map again, since it is night in the western hemisphere at this time, Beijing is located in the eastern hemisphere, and it should be daylight, excluding a and c.

Step 2: Since the shadow of the sun is getting longer and longer at noon in Beijing at this time, it can be concluded that the direct sun point is moving southward, and the solar altitude angle is getting smaller and smaller, and the direct sun point will move north after the vernal equinox, and it will move south after the autumn equinox, so it can be concluded that this is the afternoon of the autumn equinox, that is, item d.

Question 2. Because the meridians on both sides of m and n are different dates, it means that the old and new dates account for half, then the 0° meridian is 0 o'clock, the 180° meridian is 12 o'clock, Beijing is located at 120 degrees east longitude, 180-120=60 degrees and then divide 60 degrees by 15 to get a difference of 4 time zones, so it can be deduced that Beijing time is 12-4=8 hours. Option B.

You leave a QQ, I'll tell you in Q, I can't explain it here, the question is not difficult