题目内容

扑救初级火灾能力指发现火灾后，起火部位员工在多长时间内形成第一灭火力量，火灾确认后，单位多长时间内形成第二灭火力量。（）

A. 1分钟；3分钟
B. 3分钟；5分钟
C. 5分钟；10分钟
D. 10分钟；15分钟

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Which statement is true about a Smurf attack？（）

A. It sends ping requests in segments of an invalid size
B. It intercepts the third step in a TCP three-way handshake to hijack a session
C. It sends ping requests to a subnet， requesting that devices on that subnet send ping replies to a targetsystem
D. It uses Trojan horse applications to create a distributed collection of "zombie" computers， which can beused to launch a coordinated DDoS attack

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