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在验证机械能守恒定律实验中,现行教材对挑选纸带的要求是:在几条打上点的纸带中挑选第一、二两点间的距离接近2mm,并且点迹清晰的纸带进行测量,是否必须选择这样的纸带呢?
In the verification of the law of the conservation of mechanical energy, the requirements of the current teaching materials for selecting paper tapes are: Select the distance between the first and the second two points in a few paper tapes to be close to 2 mm, and measure the paper tape with clear marks. Do you have to choose such a tape?