tug -of -war

请问play tug of war拔河的由来,谢谢 tug-o-war是什么意思?拔河? In the finals of a special tug-of-war competition are three Which class are you going to play a____in the tug-of-war Which class are you going to play a______in the tug-of -war THE ART OF WAR the war of DOGS OF WAR怎么样 War of the Men of War Assault man-of-war prisoner of war是什么意思