Excuse me, Zhengzhou University, where did you find the answer during the final exam? Our learning center here gives nothing.
I don't know your major, and I don't know your exam type. Generally, when you search for your own test questions online, there will always be corresponding answers. You can follow a similar link and see if you can link to the answer to your own test paper. Don't copy when you use it, you can learn from it, because be careful that the course will give you zero points if it is found.