要严谨我在教学《温度计的秘密》一课时,为了研究液体受热、受冷后会发生热胀冷缩现象,采用了多种液体进行实验,虽然一两种液体也能得出结论,但毕竟样本太少,无法很好地说明其普遍性,也不符合科学实验的可重复性与严谨性。所以,我选择了七八种液体在各个小组内交叉实验,每个小组有三种不同的液体,分成六个小组,这样既对 To be rigorous I teach teaching “the secret of a thermometer,” a class, in order to study the liquid heat, cold expansion and contraction will occur after the cold, the use of a variety of liquids for experiments, although one or two liquids can be concluded, but after all, There are too few samples to demonstrate their universality or the repeatability and rigor of scientific experiments. So, I chose seven or eight liquids in different groups of cross-experiment, each group has three different liquids, divided into six groups, so that both