These test and inspection equipment and tools are used to make airworthiness determinations on articles.
答案解析
解析：
当然，我很乐意帮助你理解这道题目。
首先，让我们分析题干：“These test and inspection equipment and tools are used to make airworthiness determinations on articles.” 这句话的意思是，这些测试和检查的设备和工具被用来对物品进行适航性鉴定。
现在，我们来看选项：
A. 这些测试检查设备和工具是用来维修适航性产品的。
B. 这些测试校验设备和工具是用来制造适航性产品的。
C. 这些测试检查设备和工具是用来确定产品适航性的。
选项A提到了维修，而题干中并没有提到维修，所以这个选项不正确。
选项B提到了制造，但题干中说的是对已经存在的物品进行适航性鉴定，而不是制造新的适航性产品，所以这个选项也不正确。
选项C提到了确定产品适航性，这与题干中的“make airworthiness determinations”直接对应。这里的“determinations”意味着做出判断或决定，所以这个选项是正确的。
为了更好地理解这个知识点，我们可以用一个生动的例子来联想。想象一下，你是一位飞机维修师，你的工作之一就是使用各种测试和检查工具来确保飞机在飞行前是安全的。这些工具就像是你的“侦探工具箱”，它们帮助你“确定”（determine）飞机是否“适航”（airworthy）。这就好比一个侦探在调查一个案件，他使用各种工具和设备来确定真相一样。
所以，正确答案是C，这些测试检查设备和工具是用来确定产品适航性的。
相关知识点：
测试检查设备工具定产品适航
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