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【多选题】
2008年6月6日，8炼油厂油罐区的2号汽油罐发生火灾爆炸事故，造成1人死亡、3人轻伤，直接经济损失420万元。该油罐为拱顶罐，容量200m 3 。油罐进油管从罐顶接入罐内，但未伸到罐底。罐内原有液位计，因失灵已拆除。2008年5月20日，油罐完成了清罐检修。6月6日8时，开始给油罐输油，汽油从罐顶输油时进油管内流速为2.3～2.5m/s，导致汽油在罐内发生了剧烈喷溅，随即着火爆炸。爆炸把整个罐顶抛离油罐。现场人员灭火时发现泡沫发生器不出泡沫，匆忙中用水枪灭火，导致火势扩大。消防队到达后，用泡沫扑灭了火灾。事故发生后，在事故调查分析时发现，泡沫灭火系统正常，泡沫发生器不出泡沫的原因是现场人员操作不当，开错了阀门。该厂针对此次事故暴露出的问题，加强了员工安全培训，在现场增设了自动监控系统，完善了现场设备、设施的标志和标识，制订了安全生产应急救援预案。上述案例中，火灾爆炸事故发生后应立即采取的应急救援措施包括（）。
A.
报警
B.
疏散人员
C.
灭火
D.
追究事故责任
E.
抚恤伤亡人员
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【单选题】Which of the following is NOT true according to the conversation?
A.
There is no link between coffee and heart disease.
B.
Caffeine can cure headache.
C.
Tea has less caffeine than soda.
D.
Addicted people without caffeine will get headache.
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【单选题】在完成细菌总数测定时,选用以下哪个稀释梯度平板计数( )
A.
10 -5
B.
10 -6
C.
10 -7
D.
10 -8
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【单选题】Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
A.
Serial0/1 is up, line protocol is down
B.
Serial0/1 is down, line protocol is down
C.
Serial0/1 is up, line protocol is up
D.
Serial0/1 is administratively down, line protocol is down
E.
None of the above
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【单选题】工业和信息化部部长苗圩宣布，2019年将在全国实行手机用户（）
A.
“取消漫游”
B.
“降低费用”
C.
“提速降费”
D.
“携号转网”
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【单选题】Which of the following services can not offered by a link-layer protocol?
A.
congestion control
B.
Link Access
C.
Error control
D.
Framing
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【单选题】Which UNIX command creates a symbolic link named myfile in the current directory to the file /etc/hosts? ( )
A.
In —s/etc/hosts myfile
B.
In —s myfile/etc/hosts
C.
link —s/etc/hosts myfile
D.
link —s myfile/etc/hosts
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【单选题】Which of the following is INCORRECT according to the conversation?
A.
There is no link between coffee and heart disease.
B.
Caffeine can cure headache.
C.
Tea has less caffeine than soda.
D.
Addicted people without caffeine will get headache.
查看完整题目与答案
【多选题】Which two are characteristics of link-state routing protocols?（） (Choose two.)
A.
Routers choose a best path for a destination based on the SPF algorithm.
B.
All routers in a given area or level build a consistent database describing the network's topology.
C.
Routers choose the best path for a destination based on the interface on which they received the link stateadvertisement with the lowest cost.
D.
All routers in a given area or level forward link state advertisements between interfaces in the same area or level, adding their metric to the link state advertisement's cost information when they forward it.
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【单选题】Which statement is correct about an OSPF sham-link？（）
A.
A sham-link is a logical link between PE routers that provides an OSPF adjacency between the PE routers and forwards customer traffic across it.
B.
A sham-link is a logical link between PE routers that provides an OSPF adjacency between the PE routers and carries OSPF LSAs.
C.
A sham-link is a logical link between PE routers that carries OSPF LSAs and forwards customer traffic across it.
D.
A sham-link is a point-to-multipoint link that provides an OSPF adjacency between the PE routers and carries OSPF LSAs.
E.
A sham-link is a point-to-multipoint link that provides an OSPF adjacency between the PE routers and forwards customer traffic across it.
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【单选题】When a new trunk link is configured on an IOS-based switch, which VLANs are allowed over the link?
A.
By default, all VLANs are allowed on the trunk.
B.
No VLANs are allowed; you must configure each VLAN by hand .
C.
Only configured VLANs are allowed on the link.
D.
Only extended VLANs are allowed by default.
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相关题目：
【单选题】Which of the following is NOT true according to the conversation?
A.
There is no link between coffee and heart disease.
B.
Caffeine can cure headache.
C.
Tea has less caffeine than soda.
D.
Addicted people without caffeine will get headache.
查看完整题目与答案
【单选题】在完成细菌总数测定时,选用以下哪个稀释梯度平板计数( )
A.
10 -5
B.
10 -6
C.
10 -7
D.
10 -8
查看完整题目与答案
【单选题】Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
A.
Serial0/1 is up, line protocol is down
B.
Serial0/1 is down, line protocol is down
C.
Serial0/1 is up, line protocol is up
D.
Serial0/1 is administratively down, line protocol is down
E.
None of the above
查看完整题目与答案
【单选题】工业和信息化部部长苗圩宣布，2019年将在全国实行手机用户（）
A.
“取消漫游”
B.
“降低费用”
C.
“提速降费”
D.
“携号转网”
查看完整题目与答案
【单选题】Which of the following services can not offered by a link-layer protocol?
A.
congestion control
B.
Link Access
C.
Error control
D.
Framing
查看完整题目与答案
【单选题】Which UNIX command creates a symbolic link named myfile in the current directory to the file /etc/hosts? ( )
A.
In —s/etc/hosts myfile
B.
In —s myfile/etc/hosts
C.
link —s/etc/hosts myfile
D.
link —s myfile/etc/hosts
查看完整题目与答案
【单选题】Which of the following is INCORRECT according to the conversation?
A.
There is no link between coffee and heart disease.
B.
Caffeine can cure headache.
C.
Tea has less caffeine than soda.
D.
Addicted people without caffeine will get headache.
查看完整题目与答案
【多选题】Which two are characteristics of link-state routing protocols?（） (Choose two.)
A.
Routers choose a best path for a destination based on the SPF algorithm.
B.
All routers in a given area or level build a consistent database describing the network's topology.
C.
Routers choose the best path for a destination based on the interface on which they received the link stateadvertisement with the lowest cost.
D.
All routers in a given area or level forward link state advertisements between interfaces in the same area or level, adding their metric to the link state advertisement's cost information when they forward it.
查看完整题目与答案
【单选题】Which statement is correct about an OSPF sham-link？（）
A.
A sham-link is a logical link between PE routers that provides an OSPF adjacency between the PE routers and forwards customer traffic across it.
B.
A sham-link is a logical link between PE routers that provides an OSPF adjacency between the PE routers and carries OSPF LSAs.
C.
A sham-link is a logical link between PE routers that carries OSPF LSAs and forwards customer traffic across it.
D.
A sham-link is a point-to-multipoint link that provides an OSPF adjacency between the PE routers and carries OSPF LSAs.
E.
A sham-link is a point-to-multipoint link that provides an OSPF adjacency between the PE routers and forwards customer traffic across it.
查看完整题目与答案
【单选题】When a new trunk link is configured on an IOS-based switch, which VLANs are allowed over the link?
A.
By default, all VLANs are allowed on the trunk.
B.
No VLANs are allowed; you must configure each VLAN by hand .
C.
Only configured VLANs are allowed on the link.
D.
Only extended VLANs are allowed by default.
查看完整题目与答案