Paper duplication checking system will detect plagiarized content, including words, paragraphs and even the whole paper. Therefore, if you copy a book directly when writing a thesis, you are likely to be found plagiarized.

In addition, different paper duplication checking systems may have different definitions and standards for plagiarism. Some duplicate checking systems may think that citing a certain number of other people's research results or documents cannot be regarded as plagiarism, while others may regard these situations as plagiarism. So I suggest you write in your own words and expressions, and avoid copying other people's words directly.