四个数字中三个数字有几种组合

简介：Amidst the sound of war drums, the Jianlu soldiers stepped on the bloody sea of ​​stumps under the city wall and climbed up the ladder. The Ming army at the top of the city fired arrows desperately. The Jianlu soldiers climbing the ladder kept falling from the ladder, while the Ming army at the top of the city continued to fall. He also kept getting hit by arrows and fell to the ground.