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Cisco IDS sensors form the eyes and ears of your Cisco network intrusion detection system.Placing sensors correctly throughout your network is crucial to successfully implementing your Cisco intrusion detection system .Which two of these are characteristics of an IDS sensor?（）

A. has a permissive interface that is used to monitor networks
B. is an active device in the traffic path
C. passively listens to network traffic
D. has a promiscuous interface that is used to monitor the network

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对轮找正时对垫片有哪些要求？

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两个因数是小数，积一定是（）。

A. 整数
B. 小数
C. 无法判断

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某患者有丛林生活史，突发高热，伴剧烈头痛、全身酸痛、食欲减退、表情淡漠。查体：可见全身红色丘疹、水疱，腋窝可见5mm大小椭圆形黑色焦痂。用变形杆菌OXk株作抗原与患者血清进行定量凝集试验，抗体效价为1：320。该病的传播媒介是（）

A. 蚊
B. 鼠蚤
C. 蜱
D. 螨
E. 人虱

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