直方图怎么求平均值

简介：In the Ming Dynasty, big cities like Jinan Prefecture all implemented curfews and night curfews. At three o'clock in the morning, the bells stopped ringing and pedestrians were prohibited from walking. At three o'clock in the morning, the bells are ringing and people are walking. Violators will be flogged for twenty-seven times, and those with officials will be punished. His official duties are urgent, and he cannot help but suffer from illness, death, childbirth, etc.