What is the solar term that gets the least solar heat in the northern hemisphere?

Test center: The basic principle of the change of the length of day and night and the formation of the four seasons: Analysis: When the earth revolves around the sun, the axis of the earth and the orbital plane form a fixed angle of 66.5, so that the direct point of the sun's rays regularly moves between the Tropic of Cancer and the Tropic of Cancer in a year. When the sun shines directly on the equator, it is the vernal equinox or autumn equinox in the northern hemisphere; When the sun shines directly on the Tropic of Cancer, it is the summer solstice in the northern hemisphere; When the sun shines directly on the tropic of Capricorn, it is the winter solstice in the northern hemisphere. As can be seen from the schematic diagram of the earth's revolution, when the earth is in position B, the sun shines directly on the tropic of Capricorn, and the northern hemisphere gets the most solar heat. This is the summer solstice in the northern hemisphere, and the date is around June 22. So choose: B. Comments: This topic examines the reading of the schematic diagram of the earth's revolution, which is the basic topic.