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思考:乒乓球放在高脚杯中,怎样吹气,才会使球跳出杯子呢?实验材料:高脚杯1个、乒乓球1个。操作步骤:1.将乒乓球放在高脚杯中。
Thinking: Ping-pong on the goblet, how to blow, it will make the ball out of the cup? Experimental materials: Goblet 1, 1 table tennis. Steps: 1. Place the ping-pong ball in the goblet.