智慧交通是一种典型的大数据技术应用，实时道路交通情况查看功能最能体现大数据的（ ）特征。
- A.数据量巨大
- B.数据类型繁多
- C.价值密度低
- D.时效性高
正确答案及解析
正确答案
解析
本题考查大数据四大特征。
大数据的特征可以用“4V”表示，即Volume、Variety、Value、Velocity这4个V来概括大数据的特点。
（1）数据体量巨大（Volume）
（2）数据类型繁多（Variety）
（3）价值密度低（Value）
（4）时效性高（Velocity）
智慧交通实时道路交通情况体现了大数据技术的时效性高，故本题选D。
大数据技术体系
（1）数据准备环节
（2）数据存储与管理环节
（3）计算处理环节
（4）数据分析环节
（5）知识展现环节
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