这节课是科学课,上课铃打响了,同学们都回到座位上,教室里顿时鸦雀无声。诸老师满面春风地走上了讲台,微笑着向大家宣布:“同学们,这节课我们来做一个实验。”说完,老师将一个放大镜、一张白纸、一支黑笔展示在我们的眼前。我们发现纸上有一个圈。听老师讲,这和一会儿的实验有“关系”。我们都在小声地议论,有的同学说:“老师要做什么?”有的说:“这次实验肯定很有趣。”就在我们谈论之际,老师 This class is a science class, class bell ringing, the students returned to the seat, the classroom immediately silent. The teachers embarked on the podium with a breeze and smiled and announced to everyone: “Classmates, we have to do an experiment in this lesson. ” Finish, the teacher will be a magnifying glass, a piece of white paper, a black pen on Our eyes. We found a circle on the paper. Listen to the teacher, this and the experiment for a while there “relationship ”. We are all talking quietly, and some students say: “What should teachers do? ” Some say: “This experiment is certainly very interesting. ” Just as we talked about, the teacher