下载APP
举一反三
【单选题】Thanks to the GPS, the apps on your phone have long been able to determine your general location. But what if they could do so with enough precision that a supermarket, say, could tempt you with digit...
A.
rewards programs
B.
physical stores
C.
profitable insight
D.
shopping habits
【单选题】请选择：数据保密性指的是（）。
A.
保护网络中各系统之间交换的数据，防止因数据被截获而造成泄密
B.
提供连接实体身份的鉴别
C.
防止非法实体对用户的主动攻击，保证数据接受方收到的信息与发送方发送的信息完全一致
D.
确保数据是由合法实体发出的