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一、先入为主是中学生学习时常犯的错误所谓先入为主就是把先有的印象或先听进去的话认为是正确的,因而不易改变原先的印象或耐心听取后来的意见。可见先入为主是一种成见。生活经验和其他诸多因素导致学生常犯先入为主的错误,这在学生学习生物学知识时也是屡见不鲜的。例如,把粪便排出的过程叫排泄,高茎豌豆与矮茎豌豆杂交,产生后代为不高不矮,啄木鸟的长舌是为啄食树缝中的害虫而反复不断伸长的结果。相当一部分学生往往会不加考虑地将这些错误答案脱口而出。
First, preconceptions are often mistakes made by middle school students. The so-called preconceived predominance is considered to be correct when prior impressions are first heard, so it is not easy to change the original impressions or listen to later opinions. It can be seen that preconceptions are prejudices. Life experience and many other factors lead students to make common mistakes. This is not uncommon when students learn biological knowledge. For example, the process of excreting feces is called excretion. High-stem peas are crossed with dwarf peas, resulting in offspring that are not tall and short, and the long tongue of the woodpecker is the result of repeatedly elongating the pests in the tree-fed joints. A considerable number of students often blurt out these wrong answers without thinking.