单选题 Users also need (71) 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】[解析] 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。