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【单选题】
United States advertising agencies are increasingly using interviews at shopping malls, called 'mall intercepts', to test for advertising effectiveness, product concept viability, and consumer buying habits. Critics of mall intercepts maintain that the shopping habits of mall shoppers are not representative of those of the larger population. Which of the following, if true, would provide evidence that most supports the critics claim about mall intercepts?A.
Some mall shoppers patronize more than one store in any given shopping trip.
B.
Mall shoppers, on average, spend 50 percent more time shopping than shoppers at other locations do.
C.
In the course of any year, 95 percent of all households in the United States have at least one member who does some shopping at a mall.
D.
Mall shoppers who use public transportation to reach the mall tend to have lower incomes than mall shoppers who drive to the mall.
E.
Indoor malls often attract the customary numbers of shoppers even during inclement weather when outdoor malls are likely to lose business.
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举一反三
【多选题】IP欺骗的技术实现与欺骗攻击的防范措施包括()
A.
使用抗IP欺骗功能的产品
B.
严密监视网络，对攻击进行报警
C.
使用最新的系统和软件，避免会话序号被猜出
D.
严格设置路由策略：拒绝来自网上，且声明源于本地地址的包
【多选题】文件B和C是文件A的硬链接，它们之间的正确关系为（）。
A.
保持相同的编辑修改效果
B.
删除A则B、C自动失效
C.
共用同一个数据存储空间
D.
可分别出现在Linux系统的不同目录中
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【多选题】有关肩周炎的说法,下列正确的是()
A.
肩前，后，外侧均有压痛
B.
不用治疗患者亦会自愈
C.
肩关节活动受限以外展外旋最为明显
D.
多数患者可有明显的外伤史
E.
青年人不会发病