202 1 Gregorian calendar heavenly stems and earthly branches

This question examines humanistic common sense.

Item a is correct. "A, B, C, D, E, Ji, G, Xin, Ren and Gui" are called ten heavenly stems, and "Zi, Ugly, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu and Hai" are called twelve earthly branches. Ten heavenly stems and twelve earthly branches are matched in turn to form sixty basic units, and they cooperate with each other in a fixed order to form a chronology of stems and branches.

Item b is correct. "Historical Records" records the method of keeping track of the month, saying that "December is matched with twelve sons, ten mothers and twelve methods ..." The son is the branch, the mother is the stem, and the method is the bell method. Heavenly stems and earthly branches's method of keeping track of the day is a method for Han people to record the date sequence. It is a part of the lunar calendar and an important part of the almanac of past dynasties. 60 Jiazi are matched with the trunk and branches, and the cycle is recorded from Jiazi to Guihai for 60 days.

Item C is correct, and the order of ten-day work is "A, B, C, D, E, Ji, G, Xin, Ren and Gui". Therefore, the seventh is Geng.

Item D is correct, and the earthly branches can be used to represent the twelve zodiac signs, such as "Zishu, Ugly Cow, Yinhu, Hairy Rabbit, Chen Long, Sishe, Wuma, Weiyang, Monkey, Youyou Chicken, Dog and Hai Pig." In addition, earthly branches can also be used to indicate time, such as "when 23-0 1 is a child, 0 1-03 is ugly, 03-05 is Yin Shi, 05-07 is Shi Mao, 07-09 is morning, and 09-1/kloc. 13- 15 is not timely, 15- 17 is timely, 17- 19 is one yuan, 19-2 1. Error e, heavenly stems and earthly branches chronology, named after sixty branches in sequence, from Jiazi year, Ugly year to Guihai year, with a period of sixty years. The cycle reference time of the main branch year: the lunar year ending from 0: 00 on February 2, 1984 to/kloc-0 on February 24, 1985 is the year of Jiazi. So this calendar year in heavenly stems and earthly branches is based on the first day of the first month.

So the correct answer is ABCD.