题目

Here is a story told an American general (将军) who was a very important figure in the American army during the First World War. Everybody in the Untied States knew him and many people wished to have a picture or something of his in their homes. Soon after the war, the general returned to Washington. One day he went to a dentist (牙医) and had six teeth pulled out. A week later the general heard that his teeth were being sold in curiosity shops at $5 each. On each of the teeth there was a label (标签) with the name of the general and words, “Buy these teeth and show them to your friend一活塞将一定质量的理想气体封闭在气缸内，初始时气体体积为3.0×10-3m3。用DIS实验系统测得此时气体的温度和压强分别为300K和1.0×105Pa。推动活塞压缩气体，测得气体的温度和压强分别为320K和1.6×105Pa。①求此时气体的体积；②保持温度不变，缓慢改变作用在活塞上的力，使气体压强变为8.0×104Pa，求此时气体的体积。