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发布时间:2023-10-15 21:50:40

[单项选择]If you wished to transmit a message by voice concerning the safety of navigation,you would preface it by the word().
A. Mayday
B. Pan-pan
C. Securite
D. Safety

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[单项选择]You have amulti-area OSPF network and you’re concerned because one of the sites is having connectivity problem to resources in a different area. Which IOS privileged mode command would you enter to confirm that your network :A.has a path to itsABR,B.has a path to itsASBR,and C.the SPF calculation is functional()
A. show ip protocols
B. show running-config
C. show ip ospfneighbor
D. show ip ospfborder-routers
[单项选择]The frequency()the safety message will be transmitted shall be included in DSC safety call.
A. which
B. on which
C. at which
D. in which
[单项选择]You have a good voice.()
A. Thank you
B. Not at all  
C. Just so so
D. My voice isn't good
[单项选择]Which of the following statements is correct concerning diesel engine cooling water systems?()
A. Each engine must have its own engine driven cooling water pump capable of providing cooling for all ranges of operation
B. propulsion engines with bores exceeding 200 mm are to be fitted with a means to display the cooling water temperature of each cylinder
C. At least two independent sea suctions are to be provided for supplying water to the engine jackets or to the heat exchangers
D. Suitable strain are to be fitted between the circulating pumps and heat exchangers when sea water is used for direct cooling
[单项选择]Which of the following would be of immediate concern after discovering a large fire in the ship’s galley?()
A. An adjacent storeroom,containing spare parts
B. A storeroom directly above,containing combustible fluids
C. An adjacent storeroom,containing mattresses and linen
D. An adjacent storeroom,marked "Stewards Stores"
[单项选择]Which one of following statement is not true concerning the suitable sites of the direct acting relief valve and the pilot operated relieve valve?()
A. the direct acting relief valve is used for controlling lower flows and pressure
B. the pilot operated relief valve is used for controlling higher flows and pressure
C. the pilot operated relief valve is used for controlling lower flows and pressure
D. the controlling accuracy of direct acting relief valve is worse than that of the pilot operated relief valve
[单项选择]To ensure voice packets are kept within the Committed Information Rate (CIR) of a Frame Relay link, what should be used in the CPE?()
A. prioritization
B. classification
C. fragmentation
D. traffic shaping
[单项选择]For acceptable voice calls, the packet error rate should be no higher than what value?()
A. 0.1%
B. 1%
C. 2.5%
D. 25%
[判断题]Voice和Data可在MFS上实现分离。
[单项选择]当EWD上出现备忘信息:VHF3VOICE,表明:
A. 地面正在通过VHF3 COM呼叫本飞机
B. VHF3正在进行话音通讯
C. 当前可进行数据传送
D. VHF3 COM只能进行话音通讯
[多项选择]关于Voice VLAN的工作模式,说法正确的是()。
A. Voice VLAN的工作模式包含自动和手动两种
B. 自动模式下,系统会识别IP Phone发出的报文,如果匹配为语音报文,则将连接IP Phone的端口加入V.oice VLAN
C. 手动模式下,需要手工将IP Phone加入Voice VLAN中
D. 手动模式下系统将不会向端口下发ACL
[多项选择]关于Voice VLAN的工作模式,说法正确的有()。
A. Voice VLAN的工作模式包含自动和手动两种
B. 自动模式下,系统会识别IP Phone发出的报文,如果匹配为语音报文,则将连接IP Phone的端口加入Voice VLAN
C. 手动模式下,需要手工将IP Phone加入Voice VLAN中
D. 手动模式下,系统将不会向端口下发ACL
[单项选择]Listen! Who()in the next room? The voice is so beautiful.
A. sings
B. sang
C. has sung
D. is singing
[多项选择]关于Voice VLAN的端口过滤模式,说法正确的有()。
A. Voice VLAN的端口过滤模式可以分为安全模式和普通模式两种
B. 对于普通模式下,端口力口入Voice VLAN后设备不再检验报文的MAC地址
C. 安全模式下,设备将对每一个要进入Voice VLAN传输的报文都进行MAC匹配检査
D. 缺省情况下,Voice VLAN工作在普通模式

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