A review of solar terms poems

Test analysis: China invented the calendar in the Xia Dynasty, so it is called "Summer Calendar", which is the lunar calendar today. During the Shang Dynasty, the calendar in China gradually became complete, with a year 12 months, a big month of 30 days, a small month of 29 days, and a leap year 1 month. The Zhou Dynasty mainly made achievements in astronomy, such as the earliest Hailey satellite record and the solar eclipse recorded by astronomers in Shandong. During the Warring States period, in order to arrange agricultural production, people determined 24 solar terms a year, which was a great achievement in the calendar. B fits the question.

Comments: This question is relatively difficult. It examines students' ability to remember the basic knowledge of the text. Solar terms: According to the change of weather, 24 points are set in a year, and each point is called a solar term. The 24 solar terms include: beginning of spring, Spring Equinox, Long Summer, Summer Solstice, beginning of autumn, Autumn Equinox, beginning of winter and Winter Solstice.