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九年义务教育三年制初级中学教科书物理第1册P-112页的小实验“在玻璃杯里装上半杯大米,把一根筷子插在中间,将米压紧,……。” 教科书上措词不严谨,开头是在玻璃杯里装上半杯米,结尾是拿起筷子就可以把装满米的玻璃杯提起来。实验表明玻璃杯里装半杯米是做不成功的。让学生自己做加少许水不易控制,等一会儿的时间长短不易掌握。学生做不成功很扫兴。作者经过多次实验取得数据利用
Nine-year Compulsory Education Three-year Junior High School Textbook Physics Booklet P-112 A small experiment “put a half cup of rice in a glass, put a chopstick in the middle, and press the rice tightly.... ”The textbook is not rigorously worded. It starts with a half cup of rice in a glass and ends with a chopstick to lift the glass full of rice. Experiments show that half a cup of rice in a glass is unsuccessful. It is not easy for students to control themselves by adding a little water, and it will be difficult to grasp the length of time that they wait. It is very disappointing for students to fail. The author obtained data using multiple experiments