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利用简单的,成本低廉的电路来制作可以识别金属种类的简易装置。通过识别器的制作和精度校核,激发学生的兴趣和了解科学的学习方法。
Simple, low-cost circuits are used to make simple devices that recognize metal species. By recognizing the production and accuracy of checks, to stimulate student interest and understanding of scientific learning methods.