【单选题】下列描述错误的是( )
A.
信息检索是信息组织的反变换过程,是信息使用过程中最常用的方法。
C.
信息检索的关键问题是实现信息特征与用户提问特征的匹配。
D.
信息检索效果的评价指标主要有查全率和查准率。
【简答题】阅读理解 Can you imagine what our life will be like in the year 2050? Perhaps you will be flying off for a holiday on the moon, or maybe you will be taking your dog for a walk in virtual(虚拟的) reality. We...
【多选题】系统的总体布局是指()在空间上的分布特征。
【单选题】If more trees ______ planted, our city will be more beautiful. [ ]
【简答题】计算机信息检索效果的主要评价指标是什么?
【简答题】完形填空。 Ten years later, I will be 23 years old. Our city will be a 1 living place then. There will be many tall 2 and trees. Many people will visit our 3 . Almost every family will have one or two cars...
【单选题】Our lives will be more convenient because
A.
we will all have robots in our homes.
B.
we will talk with computers every day.
【简答题】二手资料调研的主要优点是( )。 A.准确性高 B.节省时间 C.及时准确 D.资料新鲜
【单选题】设备或线路资源更新时,需要同步更新以下哪些系统的数据()