初二生物课本第５０页的学生分组实验《观察唾液淀粉酶对淀粉的消化作用》中，唾液对淀粉酶的消化作用，按教材的要求，是用较多的淀粉制成浆糊（１％），再加预先取好的唾液，在３７℃左右，作用１０ｍｉｎ（水浴）来实现的。该实验中，操作步骤较为复杂，还要求有水浴加热的 In the student grouping experiment on page 50 of the second-year biology textbook, “Saliva amylase digestion of starch,” the effect of saliva on the digestion of amylase, according to the teaching materials, is to use more starch to make a paste (1% ), plus a good pre-drawn saliva, at 37 °C, the role of 10min (water bath) to achieve. In this experiment, the operation steps are more complicated and there is also a need for water bath heating.