The following is the weather forecast for a certain day in Jinan and the "diagram of the Earth's revolution" published in the Qilu Evening News. Answer questions 7-8 accordingly. 7． At this time, the orbital position of the earth

It can be seen from the schematic diagram of the earth's revolution that when the earth is at position A, the latitude line where the sun shines directly is the equator, which is the autumnal equinox in the northern hemisphere, and the date is around September 23; when the earth is at position B, , the latitude of direct sunlight is the Tropic of Capricorn, which is the winter solstice in the Northern Hemisphere, and the date is around December 22; when the earth is at position C, the latitude of direct sunlight is the equator, which is the vernal equinox in the Northern Hemisphere, and the date is March 21 Before and after the sun; when the earth is in position D, the sun shines directly on the Tropic of Cancer, which is the summer solstice in the northern hemisphere. The date is around June 22.

According to the weather forecast for a certain day in Jinan, it is winter in Jinan (Northern Hemisphere). The earth is moving closer to point B, and the direct point of the sun is near the Tropic of Capricorn. Therefore, the length of day and night in the northern hemisphere is: The days are short and the nights are long.

So choose: B.