On the schematic diagram of the earth's revolution, a, b, c and d represent the time period between two halves and four solar terms respectively. Look at the pictures and fill in the blanks: (1) Use a

On the schematic diagram of the earth's revolution, a, b, c and d represent the time period between two halves and four solar terms respectively. Look at the pictures and fill in the blanks: (1) Use arrows to indicate the ground on the icon. (1) The direction of the earth's rotation and revolution is from west to east;

(2) The geographical phenomenon caused by the revolution of the earth is the change of the length of day and night and the formation of four seasons; As shown in the figure:

(3) During the revolution of the earth, the direct point of the sun moves regularly between the tropic of cancer; According to the chart, the process from vernal equinox to summer solstice in the northern hemisphere is a;

(4) The period of short days and long nights in the northern hemisphere is a C and D process of the earth's movement;

So the answer is: (1); (2)(3)A； (4)C； D.