单选题
______is a collection of data sets, which is so large and complex that is becomes difficult to process using on-hand database management tools or traditional data processing applications.
【正确答案】
A
【答案解析】 大数据是一组数据的集合，由于要处理的数据太大，太复杂，所以传统的常规技术手段无法对付。
Big data是大数据。