如图,敌人欲从河岸B进攻对岸A,河上有13座桥,为阻止敌人进攻决定将桥炸坏.试问至少炸掉____ 座桥可将敌人拦阻在河岸B.
The clothes in the wardrobe(衣柜). Don't put them on the bed.