【单选题】预警评价指标可分为人的安全可靠性指标、生产过程环境安全指标、安全管理性指标和物质安全可靠性指标4类。其中,人的安全可靠性指标又分为生理、心理和技术指标3类。这里的心理因素包括( )。
【简答题】命题 P :三角形的内角和等于 180 o ,则 非P:______________
【简答题】命题 p :三角形的内角和等于 180 o,则¬p:
【单选题】由主机重量引起的载荷和螺栓安装时引起的张紧力载荷均会使环氧垫片压缩环氧垫片的压缩量一般可考虑为垫片厚度的千分之()
【判断题】三2二、首读率为首次读出条码符号数量/识读条码符号的总数量*100%一般在95%以上
【单选题】戏剧对生活的模仿,主要包括了以下两个彼此相关的方面:“人生如戏”和
【单选题】由主机重量引起的载荷和螺栓安装时引起的张紧力载荷均会使环氧垫片压缩。环氧垫片的压缩量一般可考虑为垫片厚度的千分之( )。
【多选题】Which three IP multicast group concepts are true?()
A.
If a packet is sent to a multicast group address, the multicast frame contains the source multicast address.
B.
A router does not have to be a member of a multicast group to receive multicast data.
C.
A router must be a member of a multicast group to send to the group.
D.
A router does not have to be a member of a multicast group to send to the group.
E.
If a packet is sent to a multicast group address, all members of the multicast group will rece ive it.
F.
A router must be a member of a multicast group to receive multicast data.