平均数的计算公式

简介：This place is only more than twenty miles away from the Gecun Ferry on the Ziya River, and after crossing the Ziya River, you can reach Hejian Prefecture in a distance of forty miles. In other words, Jinghe Town is no longer far away from Hejian Prefecture. Seventy miles have passed, but the three thousand Shandong soldiers led by You Shiwei cannot continue to move forward. From yesterday afternoon to now, the three thousand soldiers have not moved.