Geographical problems. . Seek analysis. Every space needs to be parsed. .

(1) Northern Hemisphere: The earth turns from east to west.

(2) Summer solstice and summer: Extreme day occurs in the Arctic Circle.

(3) The longest point: C and the shortest point: D, with a difference of 12 hours. Interpretation: During the summer solstice in the northern hemisphere, in the area north of the Tropic of Cancer, the higher the latitude, the longer the day, and the extreme day phenomenon appears in the Arctic Circle. This is the longest day of the year. Point D is located on the equator, which is divided equally day and night throughout the year.

(4) Point C: 15, Beijing time 3: 00: As can be seen from the figure, (180,0) is the intersection of the morning line and the equator, and at 6: 00, it can be deduced that point C is 120 E at 3: 00 and 15.

(5) The highest point of the sun's height is point A, and the maximum rotational linear velocity is north of the Arctic Circle, which is the same as the angular velocity of point C in the figure. Interpretation: From summer to the sun, the sun shines directly on the Tropic of Cancer, with a height of 90, and point A is located on the Tropic of Cancer; From summer to the sun, the rotational linear velocity of the northern hemisphere increases with the increase of latitude, and point C is located on the Arctic Circle, so the angular velocity is the same. The content of this chapter is more difficult in high school geography. If we understand the high and difficult points of geography, we can solve one. Hehehe! ! ! Start (a disease) ....