有这样一道“脑筋急转弯”题目:一辆装满货物的大卡车要通过一个桥洞时,因货物高出侨洞几厘米而无法通过。请问在不卸货的情况下,怎样才能使卡车顺利通过桥洞? There is such a “Riddles ” topic: a truck loaded with goods to go through a bridge hole, due to the cargo a few centimeters higher than the opening hole can not pass. I would like to ask in the case of unloading, how to make the truck smoothly through the bridge?