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筷子的神力思考:把一根筷子插入装着米的杯子中,然后将筷子上提,筷子会把米和杯子提起吗?材料:塑料杯一个、米一杯、竹筷子一根操作:1.把米倒满在塑料杯子里。2.用手将杯子里的米按一按。3.用手按住米,从手指缝间插入筷子。4.用手轻轻提起筷子,杯子和米一起被提起来了。讲解:杯内米粒之间的挤压,使杯内的空
Chopsticks divine power to think: Put a chopstick into the cup filled with rice, and then the chopsticks on the lift, the chopsticks will lift the rice and cups? Material: a plastic cup, a cup of rice, bamboo chopsticks an operation: 1. The rice Filled in a plastic cup. 2. Press the cup in one hand by hand. 3. Hold down the meter by hand and insert the chopstick into the seams of the fingers. 4. Gently lift the chopsticks by hand, the cup and the rice are brought up together. Explain: the squeeze between the cup of rice, the cup of empty