初中课文重难点确定与突破[重难点确定]本文从具体生动的物候现象说起，条理分明地说明了物候现象的特征、成因和意义。因此，领会本文的逻辑顺序应该是教学的重点。这是三种说明顺序中最复杂的，因而也是本文教学的难点。在介绍物候这一自然现象时，本文多处运用了举例子的说 The determination and breakthrough of heavy and light textbooks in junior middle school [Difficulties in determining the points] This article starts from the concrete and vivid phenomenon of phenology, and clearly describes the characteristics, causes and significance of phenological phenomena. Therefore, understanding the logical sequence of this article should be the focus of teaching. This is the most complex of the three explanation sequences and is therefore a difficult point in the teaching of this article. When introducing the natural phenomenon of phenology, this article used many examples to say