Yancheng Friendly Interface Patent Retrieval

1. signal is the carrier of information. Error, signal is just one of the carriers of information. 2. A simple keyword index is an index that arranges a group of keywords separated from the text, abstract and title of a document in alphabetical order. Correct 3. Design patent refers to the appearance of a product. Creativity and innovative design. Correct. 4. Users can modify the search formula repeatedly in the process of leveling information retrieval until they get satisfactory search results. Correct 5. Whether the user interface is friendly or not is one of the performance indexes to evaluate the search engine. Correct choice: 1. You should know the growth rate of China's GDP since 2000. This kind of retrieval belongs to: A literature information retrieval B data information retrieval C fact information retrieval D other retrieval 2. Knowing only the ISBN of a book, which retrieval method should I choose? A classified retrieval b subject retrieval c author retrieval d information coding method 3. In Wan Fang data resources, which subsystem does the science and technology report database belong to? A digital periodical b enterprise service subsystem c medical information subsystem d science and technology information subsystem 4. Patent documents in a narrow sense usually refer to: A application specification B patent specification C patent bulletin D patent classification table 5. What kind of search engine is 5? Google: A keyword type b directory type c collection type d special type.