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[多选] There are many reasons why customers lack sufficient security measures on the network. Which two reasons for insufficient security are typical of the customers today?()

A . the desire to avoid unnecessary technologies
B . the belief that free security tools are sufficient
C . the perceived costs of security solutions
D . the use of hosted email services eliminating the need for local security
E . the lack of threats to their network
F . the lack of risk analysi

何谓等高线? 它有哪些特性?   若遇到大雾、暴风雨,照明不良而影响能见度,应采取的措施是()。 运输设备慢速行驶。 挖掘机及排土设备一定谨慎操作。 应立即停止作业。 下列哪项不是均匀流的特征()。 各过水断面均为平面,并且形状和尺寸沿流程不变。 各过水断面上流速分布均相同,断面平均流速也相等。 均匀流过水断面上的动水压强分布规律与静水压强分布规律相同,即同一过水断面上各点的测压管水头为一常数。 液体的迹线与流线重合。 浅孔固结灌浆压力,有盖重时可采用(3~7)×105Pa;无盖重时可取(2~5)×105Pa。 根据经典条件反射作用理论,铃声可以诱发狗的唾液分泌反应,则铃声是()。 中性刺激。 无条件刺激。 条件反应。 无条件反应。 There are many reasons why customers lack sufficient security measures on the network. Which two reasons for insufficient security are typical of the customers today?()
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