Look at the picture and complete the following requirements (1). In the figure, A, B, C and D respectively represent the position of the earth on the bisection orbit, where A stands for _ _ _ _ _ _ _

Look at the picture and complete the following requirements (1). In the figure, A, B, C and D respectively represent the position of the earth on the bisection orbit, where A stands for _ _ _ _ _ _ _ _ _ solar terms. (1) In the figure, the sun at position B points directly to the Tropic of Cancer, which is the summer solstice in the northern hemisphere, and the sun at position D points directly to the Tropic of Cancer, which is the winter solstice in the northern hemisphere. According to the revolution direction of the earth, A is the vernal equinox and C is the autumnal equinox.

(2) At the beginning of June+10 in 5438, the earth was at perihelion and the revolution speed was the fastest. When the earth moves to point D (winter solstice), its revolution speed is faster, and the southern hemisphere is in summer.

(3)A is the vernal equinox and C is the autumnal equinox. When the earth moves to points A and C, the sun shines directly on the equator, and the world is divided equally between day and night.

(4) When the earth moves near point B (summer solstice), the sun shines directly at 23 26 ′ N, the days and nights in the northern hemisphere are short, and extreme days appear in the Arctic Circle.

So the answer is:

(1) spring equinox summer to Sunday autumn to Sunday winter to Sunday

(2) Rapid summer

③ equator? equilong

(4) 23 26' north latitude? Long days and short nights? polar day