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【多选题】
防范系统攻击的措施包括（）。
A.
关闭不常用的端口和服务
B.
定期更新系统或打补丁
C.
系统登录口令设置不能太简单
D.
安装防火墙
手机使用
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【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
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【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
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