本文描写作者应邀为老同学解决一起与学生的物理题“纠纷”。学生不同意单一的答案，觉得自己应该得到高分而不是零分，于是和老师协议邀请第三方公正的我解决问题。
Hints：
有引号
S=1/2 at^2
I excused myself for interrupting him and asked him to go on. In the next minute, he dashed off his answer, which read: "Take the barometer to the top of the building and lean over the edge of the roof. Drop the barometer and time its fall with a stop watch. Then, using the formula S=1/2 at^2 calculate the height of the building."
At this point, I asked my colleague if he would give up. He nodded yes, and I gave the student almost full credit.
When I left my colleague's office, I recalled that the student had said that he had other answers to the problem. I was curious, so I asked him what they were. "Oh, yes," said the student. "There are many ways of getting the height of a tall building with the aid of a barometer. For example, you could take the barometer out in a sunny day and measure the height of the barometer, the length of its shadow, and the length of the shadow of the building, and by the use of a simple proportion, determine the height of the building. The beauty of this method is that you don't have to drop the barometer and break it."
"Fine," I said. "Any more?"
我为自己打断他感到抱歉，让他继续做题。在下一分钟，他匆忙地写下了他的答案，他是这样写的：“将气压计带到楼顶，将气压计靠在顶部的边缘。然后把气压计丢到楼下，同时用秒表计算跌落到地的这段时间。最后，运用S=1/2 at的平方这个计算公式计算出楼房的高度。”
对于这个答案，我问我的同事他是否决定放弃他的唯一答案，承认这个学生的也是对的。他说他放弃，于是我给了这个学生几乎满分。
当我离开我同事的办公室的时候，我回想起这个学生说他还有好几种方法解决这个问题。我感到很好奇，于是我问他还有哪些方法。“哦，是这样的。”那个学生说。“还有很多种方法可以只用气压计就测量出楼房的高度。举个例子，你可以在晴朗的天气拿出气压计然后量出气压计以及它的影子的长度，还有楼房影子的长度。然后通过一个简单的比例，就可以计算出楼房的高度。这个方法最棒在于你可以不用把气压计从高空扔到地上以至于气压计被摔坏。
“不错，”我说.“还有别的方法吗？”