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ni ting , di qiu gun dong de sheng yin
Pages: 54-56
Year: Issue:  5
Journal: Knowledge is Power

Abstract:  邻家上初中的女孩有一天突发奇想,眨巴着大眼睛问我:"老师,我们为什么听不到地球滚动的声音?"我一愣--这问题还真从没想过.一时语塞.只得反问道:"那么.你觉得地球滚动的声音应该怎样呢?"
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