单选题

Users also need (69) systems to help them explore the Web and discover interesting data sources and interfaces that support different query and search paradigms.
【正确答案】 B
【答案解析】[分析] 用户也需要适应性的系统以帮助他们探索网络、发现支持不同查询和搜索范例的有趣数据源和界面。