图书馆学 - 2026 进行中
1000 ₸
科目: 图书馆学 级别: VI
类别: 大学生
测试题目: 英语
问题示例: A librarian wants results containing either the term “biodiversity” or the term “ecosystem diversity,” but not necessarily both. Which Boolean operator should connect the two terms? AND, NOT, OR, NEAR