1 answer: books, periodicals, patent documents, standard documents, dissertations, conference documents, scientific reports, product samples and instructions (I'm not sure), technical files and government publications.

Answer: (Try the search term specifically) Search type-Title = Digital Signal Processing and Publishing House = Electronic Industry Publishing House. The publication year is between 2000 and now.

How many books did Wesley write? Search-Author = Wesley

Modern information retrieval in Ma Guohua? Retrieval-Author = Ma Guohua, Title = Modern Information Retrieval

Answer: (specific operation) I don't know which major you are. It's not a library major, is it

5, 6, 7, 8, 9, 10, 1 1 2 are all specific operation problems. You have to try to write the answer in the database. I can't help you.