种子是绿色开花植物的六大器官之一,也是绿色开花植物体的发源地,它是植物体的构造和功能的一部分。在讲“种子”时,为了使学生的思想集中,我首先向学生提问:“一株绿色开花的植物是从哪里来的?”学生稍加思索就能回答是种子。接着又问:“种子为什么能发育成一棵植物体呢,它又是怎样发育成植物体的呢?”这些问题,一般说来,学生是一下回答不出来的。提问的目的也不在于让学生回答,而是为了点出这节课的主题和中心,以便引起学生的注意。讲完菜豆、玉米种子的构造,我让学生找出两者在构造上的异同点,归纳出 Seeds are one of the six organs of a green flowering plant and are also the birthplace of a green flowering plant that is part of the plant’s anatomy and function. When focusing on “seeds,” I first ask the students, “Where does a green flowering plant come from?” To get the students’ minds concentrated, students can answer seeds with a little thought. Then he asks: “Why can a seed develop into a plant and how does it develop into a plant?” These questions are generally not answered by the students. The purpose of the question is not to let the students answer, but to point out the topics and center of the lesson in order to arouse the students’ attention. Finished bean, corn seed structure, I let the students find out the similarities and differences between the two structures, summed up