我从多年幻灯教学中摸索出一种配合课堂教学的“水螅实物投影放大”方法,现介绍如下:1.玻璃槽的制作(1)用料 2毫米厚的碎玻璃和橡皮,胶布。(2)制作方法①把玻璃块分割成8厘米×6厘米规格,共两片。②用剪子或刀片把橡皮铰成“凹”字形的垫。③把橡皮垫夹在两块玻璃之间,用胶布粘好即可。2.操作放大先用吸管往玻璃槽内灌水,水面的高度要适当,不 I learn from the slide teaching for many years with a classroom teaching “hydration physical projection amplification” method, are described as follows: 1. Glass tank production (1) material 2 mm thick broken glass and rubber, tape. (2) Production Method ① The glass block is divided into 8 cm × 6 cm specifications, a total of two. ② Use a pair of scissors or a blade to hinge the rubber into a “concave” shape. ③ The rubber mat sandwiched between two pieces of glass, with a good adhesive tape can be. 2. The first operation to enlarge glass with straw to the tank, the height of the water should be appropriate, no