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初一地理教材上有一条规律:大致海拔每升高100米,气温约降低0.6℃。在多数学生的脑海中,只要知道山脚的气温和山顶的相对高度,就可求出山顶的大致气温,仅此而已。看到学生们轻松的神态,我在黑板上画了一幅高山示意图,问学生:你能否用一个简便的方法测出一座高山的大致高度,即山顶与山脚的相对高度?学生们议论纷纷。显然用皮尺量是不行的,用卫星测虽然准确但不是简便方法。有的同学提出可
There is a rule in the first-year geography textbook: roughly every elevation of 100 meters above sea level, the temperature drops by about 0.6 degrees Celsius. In the minds of most students, as long as you know the temperature of the foot of the mountain and the relative height of the top of the mountain, you can find the approximate temperature of the top of the mountain, and that’s it. After seeing the students’ relaxed attitude, I drew a map of the high mountains on the blackboard and asked the students: Can you measure the approximate height of a mountain in a simple way, that is, the relative height of the mountain top and the foot of the mountain? . Obviously, using a tape measure is not acceptable. Although satellite measurement is accurate, it is not an easy method. Some students proposed