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When comparing and contrasting the similarities and differences between bridges and switches, which of the following are valid statements?（）

A、Bridges are faster than switches because they have fewer ports.

B、A switch is a multiport bridge,

C、Bridges and switches learn MAC addresses by examining the source MAC address of each frame received.

D、A bridge will forward a broadcast but a switch will not.

E、Bridges and switches increase the size of a collision domain.

F、None of the above statements are true.

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第1题

[单选题] Under identical load conditions，nylon，when compared with natural fiber line，will stretch（）.

A、less and have less strength B、more and have less strength C、more and have greater strength D、less and have greater strength

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第2题

[单选题] Which statement is TRUE when comparing cold and warm fronts?（）

A、Cold fronts are more violent and of shorter duration B、Cold fronts are milder and last longer C、They are very similar with the exception of wind direction D、Warm fronts are more violent and of longer duration

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第3题

[] （）with the size of the whole earth, the highest mountains do not seem high at all.

A、A.If you compare B、B.Compare them C、C.When compared D、D.A comparison

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第4题

[单选题] You should frequently compare drum-mounted and remote-reading water level indicators（） between these have contributed to failures because of overheating through shortage of water, when a boiler was being oil-fired.

A、descriptions B、discrepancies C、different D、deflections

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第5题

[单选题] Vapor given off by a flammable liquid will burn when ignited provided（）

A、the vapor and air mixture is too rich B、it is mixed with certain proportions of air C、the vapor is too little compared to the air D、it is of heavy toxicity

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第6题

[单选题] When ordering a new IBM Power Systems server, a customer is given the option of two types of Hardware Management Console:7042-CR4 and 7042-C06. Which main difference between the options would influence the customer's decision?（）

A、The 7042-CR4 is a rack mounted model, compared to the 7042-C06, which is adesktop. B、The 7042-CR4 is limited to 16 managed systems, compared to a limit of 32 for the 7042-C06. C、The 7042-C06 has faster CPUs and twice the RAM compared to the 7042-CR4,which is suited to large enterprise deployments. D、The 7042-C06 can manage POWER5-based hardware, in addition to POWER6, while the 7042-CR4 can only manage POWER6-based hardware.

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第7题

[单选题] Priming of the tides occurs（）.

A、at times of new and full Moon B、when the Earth，Moon，and Sun are lying approximately on the same line C、when the Moon is between first quarter and full and between third quarter and new D、when the Moon is between new and first quarter and between full and third quarter

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第8题

[单选题] Priming of the tides occurs（）.

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第9题

[单选题] How would you pass a red buoy in the maritime buoyage system“A” （）.

A、keep the buoy on the vessel's starboard side when approaching a port and on the vessel's port side when leaving B、keep the buoy on the vessel's port side when approaching a port and on the vessel's starboard side when leaving C、keep the buoy on the vessel's starboard side when approaching and leaving D、keep the buoy on the vessel's port side when approaching and leaving

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