关于呼吸困难,下述的哪项描述是正确的?
A.轻度呼吸困难时患者出现三凹征
B.呼气性呼吸困难表现为吸气时间延长
C.吸气性呼吸困难时出现哮鸣音
D.气胸时的呼吸困难属于混合性呼吸困难
E.慢性阻塞性肺气肿患者不出现呼气性呼吸困难
第1题
A.Thisout-of-bandapproachsupportsscaling
B.SLB· isnotinline.
C.Modeisnotascommonasbridgeorroutedmode.
D.ReturntrafficrequiresPB·R,serverdefaultgatewaypointingtoSLB·,orclientsourceNAT·
第2题
A.-40dBmsignaland-90dBmnoise
B.-50dBmsignaland-90dBmnoise
C.-30dBmsignaland-90dBmnoise
D.-20dBmsignaland-90dBmnoise
第3题
A.19dbm
B.10dbm
C.67dbm
D.86dbm
第4题
A.Implementhighlyredundantswitchingandlinkswithnosinglepointsorpathsoffailure.
B.Implementserverloadbalancing.
C.ImplementtheHotStandbyRouterProtocol(HSRP)forfailoverprotection.
D.Implementintrusiondetectionwithautomaticnotificationofintrusionattemptsinplace.
第5题
A.hasapermissiveinterfacethatisusedtomonitornetworks
B.isanactivedeviceinthetrafficpath
C.passivelylistenstonetworktraffic
D.hasapromiscuousinterfacethatisusedtomonitorthenetwork
第6题
A. determine types of protocols to be supported
B. determine the environment in which the router will be used
C. select the number of WAN ports required
D. select the number of LAN ports required
第7题
A.IPtelephony
B.security
C.IPmulticasting
D.QoS
第8题
A. optical technology for transmitting up to 32 channels over multiple fiber strands
B. optical technology for transmitting up to 16 channels over multiple fiber strands
C. a WDM system that is compatible with EDFA technology
D. a technology for transmitting more closely packed optical signals using more sophisticated transceiver designs than CWDM .
第9题
A.echo
B.jitter
C.packetloss
D.digitizedsampling
第10题
A. It resembles a Layer 2 bridge.
B. Traffic flow through the IPS resembles traffic flow through a Layer 3 router.
C. Inline interfaces which have no IP addresses cannot be detected.
D. Malicious packets that have been detected are allowed to pass through, but all subsequent traffic is blocked.
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