When the sun shines directly on the Tropic of Cancer, the solar terms on that day are () A, winter solstice B, vernal equinox C, autumn equinox D and summer solstice.

Analysis: when the sun shines directly on the tropic of Capricorn, this day is called the winter solstice, that is, 65438+February 22. The days in the northern hemisphere are short and the nights are long, and the phenomenon of extreme night appears in the Arctic Circle. When the sun shines directly on the Tropic of Cancer, this day is called the summer solstice, that is, June 22nd. The northern hemisphere has long days and short nights, and the Arctic Circle has extreme days. When the sun shines directly on the equator for the first time, this day is called the vernal equinox, that is, March 2 1, and the world is divided equally between day and night; The second direct sunlight at the equator is the autumnal equinox. On September 23rd, the world is divided equally between day and night. The time when the sun directly hits the Tropic of Cancer is June 22nd, which is the summer solstice in the northern hemisphere. So choose: D. Comments: This question examines the basic principles of the formation of the four seasons and belongs to the basic question.