请问这句话的语法正确吗?
问题描述：
请问这句话的语法正确吗?
To identify the two substances, which are chosen randomly amongst six white powders, by carrying out a range of experiments. 如有语病请予以纠正,谢谢各位大虾了...
不好意思，没粘贴全。这是个化学报告，开头原句是这样的
Aim：To identify the two substances, which are chosen randomly amongst six white powders, by carrying out a range of experiments.
答
可改为：
To identify the two substances,which are chosen randomly amongst six white powders,a range of experiments has been carried out.