choose one esch

5. () is the world's largest Chinese ebook resource database A, Super-Star Digital Library B, Scholar Home digital Library C, Peking University Digital Library D, OPAC 6. The three elements of the literature do not include the (. A, knowledge B, carrier C, Record mode D, logic 7. Which of the following is not a library service: A, book borrowing B, interlibrary borrowing C, database development D, reference consultation 8. Which of the following is a specific common abstract database for social sciences. A, CNKI B, Superstar Digital Library C CASHL D EI