Reading question: (1) What are the solar terms when the earth is in four positions: A, B, C and D? Please fill in the blanks of the corresponding letters in the form. (2

(1) When the earth is located in the four positions of A, B, C and D in the figure, it is the summer solstice, autumnal equinox, winter solstice and vernal equinox respectively;

(2) The revolution direction of the earth is from west to east;

(3) In the northern hemisphere, March, April and May, including the vernal equinox (around March 2 1), are generally divided into spring; Divide June, July and August, including the summer solstice (around June 22nd), into summer months; September including 10, 1 1 including the vernal equinox (around September 23rd) is divided into autumn; 12, 1 and February, including the winter solstice (around 65438+February 22nd), are divided into winter. The seasons in the southern hemisphere are opposite to those in the northern hemisphere.

So the answer is:

( 1);

(2);

(3) vernal equinox; Summer solstice; Autumnal equinox; Solstice of winter; On the contrary.