大小和单双哪个概率高

简介：In the early days, due to the viewing angle, it was difficult for the defenders at the top of the city to attack the bandits digging under the city wall. They could only watch the bandits dig up the city bricks and walk away. When the bandits besieged Kaifeng for the second time, there was a man named Zhang Jian. The scholar came up with a good idea and designed a hanging tower specifically designed to deal with rogue thieves digging into the city.