Question

我在同学国外学习的资料库里看到的句子...总觉得怪怪的，有人能解释一下么

it defines which other documents are included as parts of the contract or subcontract
这个which好奇怪的是什么从句么

Answer 1

which 在这里不是从句，它是作为正常的形容词，指“哪些"。
it defines which other documents are included as parts of the contract or subcontract
它定义了其他哪些的文件是包括在合同或子合同部分内。