平瓦屋面的上下排平瓦的瓦头和瓦尾的搭扣长度为30~50mm。
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采煤工作面严禁使用木支柱支护(极薄煤层除外)和金属摩擦支柱支护。
A. 正确
B. 错误
根据不同的分类标准,入侵检测系统可分为不同的类别。按照信息源划分入侵检测系统是目前最通用的划分方法,入侵检测系统主要分为两类,即基于()的IDS和基于主机的IDS。
A. 应用
B. 网络
C. 传输
D. 协议
The ventilation system of your ship has fire dampers restrained by fusible links. Which statement is TRUE?()
A fusible link will automatically open after a fire is extinguished and reset the damper
B. Fusible links must be replaced at every inspection for certification
C. Fusible links are tested by applying a source of heat to them
D. Fusible links must be replaced if a damper is activated