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Clearances of bridges and overhead cables below Bonneville Dam refer to heights in feet above mean ______.
A.lower low water
B.high water
C.low water
D.sea level
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更多 “ Clearances of bridges and overhead cables below Bonneville Dam refer to heights in feet above mean ______.A.lower low waterB.high waterC.low waterD.sea level ” 相关考题
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Which routing algorithm is described below?It is a mechanism in which the sending station determines the route the frame. will follow andincludes the routing information with the flame；bridges read the routing information to determineif they should forward the frame．A．Fixed RoutingB．Spanning TreeC．Source RoutingD．Frame. Forwarding
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RefertotheoutputshownonswitchSW1below：Warning：Spantreeportfaststartshouldonlybeenabledonportsconnectedtoasinglehost.Connectinghubs，concentrators，switches，bridges，etc.toafaststartportcancausetemporaryspanningtreeloops.Usewithcaution.Spantreeports4/1-24faststartenabled.Whatcommandcouldyouentertoreproducethisoutput？
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Contour elevations on this chart refer to heights in feet above mean ______.A.lower low waterB.high waterC.low waterD.sea level
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Normal pool elevation is the height in feet of the section of river above a dam. This height is measured from ______.A.low steel on the Huey P. Long BridgeB.mean sea levelC.the local water tableD.the minimum dam control level
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If you must jump from a ship，your posture should include ______．A.holding down the life preserver against the chest with one arm crossing the other，covering the mouth and nose with a hand，and feet togetherB.knees bent and held close to the body with both arms around legsC.body straight and arms held tightly at the sides for feet first entry into the waterD.both hands holding the life preserver below the chin，with knees bent，and legs crossed
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Below 600 feet ocean waters range from dimly lit to completely dark.A:inadequately
B:hardly
C:faintly
D:sufficiently
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Below 600 feet ocean waters range from faintly lit to completely dark.A:inadequately
B:hardly
C:dimly
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The World's Longest BridgeRumor has it that a legendary six-headed monster lurks in the deep waters of the Tyrrhenian Sea between Italy and the island of Sicily._______(46)When completed in 2010,the world's longest bridge will weigh nearly 300,000 tons一equivalent to the iceberg that sank the Titanic一and stretch 5 kilometers long."That's nearly 50 percent longer than any other bridge ever built."says structural engineer Shane Rixon._______(47)They're suspension bridges,massive structures built to span vast water channels or gorges.A suspension bridge needs just two towers to shoulder the structure's mammoth weight, thanks to hefty supporting cables slung between the towers and anchored firmly in deep pools of cement at each end of the bridge.The Messina Strait Bridge will have two 54,100-ton towers,which will support most of the bridge's load.The beefy cables of the bridge,each 1.2 meter in diameter, will hold up the longest and widest bridge deck ever built.When construction begins on the Messina Strait Bridge in 2005,the first job will be to erect two 370 meter-tall steel towers._______(48)Getting these cables up will be something. It's not just their length一totally 5.3 kilometers一but their weight._______(49)After lowering vertical"suspender"cables from the main cables,builders will erect a 60- meter一wide 54,630一ton steel roadway,or deck一wide enough to accommodate 12 lanes of traffic.The deck's weight will pull down on the cables with a force of 70,500 tons.In return,the cables yank up against their firmly rooted anchors with a force of 139,000 tons一equivalent to the weight of about 100,000 cars. Those anchors are essential._______(50)_______（49）A:Some environmentalists are against the project on biological grounds.B:What do the world's longest bridges have in common?C: If true ,one day you might spy the beast while zipping（呼啸而过）across the Messina Strait Bridge.D:They're what will keep the bridge from going anywhere.E:The second job will be to pull two sets of steel cables across the strait,each set being a bundle of 44,352 individual steel wires.F: They will tip up the scales at 166,500 tons一more than half the bridge's total mass.
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Refer to the output shown on switch SW1 below： Warning： Spantree port fast start should only be enabled on ports connected to a single host.Connecting hubs， concentrators， switches， bridges， etc. to a fast start port can cause temporaryspanning tree loops. Use with caution. Spantree ports 4/1-24 fast start enabled. What command could you enter to reproduce this output？
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Refer to the exhibit. The two connected ports on the switch are not turning orange or green. What would be the most effective steps to troubleshoot this physical layer problem?（）A、Ensure that the Ethernet encapsulations match on the interconnected router and switch ports.B、Ensure that cables A and B are straight-through cables.C、Ensure cable A is plugged into a trunk port.D、Ensure the switch has power.E、Reboot all of the devices.F、Reseat all cables.
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Which of the following statements are true regarding bridges and switches?（）A、Switches are primarily software based while bridges are hardware based.B、Both bridges and switches forward Layer 2 broadcasts.C、Bridges are frequently faster than switches.D、Switches have a higher number of ports than most bridges.E、Bridges define broadcast domains while switches define collision domains.F、Both bridges and switches make forwarding decisions based on Layer 2 addresses.
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Which of the following statements are true regarding bridges and switches (Choose 3.)（）。A、Switches are primarily software based while bridges are hardware based.B、Both bridges and switches forward Layer 2 broadcasts.C、Bridges are frequently faster than switches.D、Switches have a higher number of ports than most bridges.E、Bridges define broadcast domains while switches define collision domains.F、Both bridges and switches make forwarding decisions based on Layer 2 addresses.
考题
When cabling a rack， which of the following is BEST practice？（）A、 Use rack specific cabling hardwareB、 Let cables hang loosely behind the serversC、 Channel all power cables down the sides， and all network cables down the centerD、 Keep cables close to the front of the rack for better access
考题
单选题If you must jump from a ship，your posture should include（）.A
holding down the life preserver against the chest with one arm crossing the other，covering the mouth and nose with a hand，and feet togetherB
knees bent and held close to the body with both arms around legsC
body straight and arms held tightly at the sides for feet first entry into the waterD
both hands holding the life preserver below the chin，with knees bent，and legs crossed
考题
单选题When cabling a rack， which of the following is BEST practice？（）A
Use rack specific cabling hardwareB
Let cables hang loosely behind the serversC
Channel all power cables down the sides， and all network cables down the centerD
Keep cables close to the front of the rack for better access
考题
单选题The information regarding ports such as buoyed channels,fairway,location and number of terminals,river channels,details of navigational marks,location of overhead bridges, underground cables etc. are shown in（）A
small-scale chartsB
medium-scale chartsC
large-scale chartsD
natural scale charts
考题
单选题As you approach Shreves cut-off you see Red River LandingGage (302.4 AHP) which reads 4.2 feet. Which of thefollowing statements is TRUE? （）A
This reading is at the same elevation as the 6.2 ft. mark on the gage at Head of PassesB
A vessel drawing 8 ft would be able to pass over the sill at Old River LockC
This reading is 6.4 feet below the Low Water Reference PlaneD
A vessel drawing 7 ft. would be able to pass through the locks at Lower Old River
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单选题A crew member has suffered frostbite to the toes of both feet. You should（）.A
immerse the feet in warm waterB
warm the feet with a heat lampC
warm the feet at room temperatureD
rub the feet
考题
单选题Contour elevations on this chart refer to heights in feet above mean （）.A
lower low waterB
high waterC
low waterD
sea level
考题
单选题On every vessel，distress signals must be stowed（）.A
on or near the navigating bridgeB
on the flying bridge not closer than 15 feet to any bulkheadC
above the freeboard deck away from heatD
in an enclosed space below the freeboard deck away from heat
考题
问答题Refer to the output shown on switch SW1 below： Warning： Spantree port fast start should only be enabled on ports connected to a single host.Connecting hubs， concentrators， switches， bridges， etc. to a fast start port can cause temporaryspanning tree loops. Use with caution. Spantree ports 4/1-24 fast start enabled. What command could you enter to reproduce this output？
考题
单选题Clearances of bridges and overhead cables below Bonneville Dam refer to heights in feet above mean （）.A
lower low waterB
high waterC
low waterD
sea level
考题
单选题Normal pool elevation is the height in feet of the section of river above a dam. This height is measured from（）.A
low steel on the Huey P. Long BridgeB
mean sea levelC
the local water tableD
the minimum dam control level
考题
单选题A cofferdam is（）.A
any deck below the main deck and above the lowest deckB
a member that gives fore-and-strengthC
made by placing two bulkhead a few feet apartD
a heavy fore-and-aft beam under the deck
考题
多选题Refer to the exhibit. The two connected ports on the switch are not turning orange or green. What would be the most effective steps to troubleshoot this physical layer problem?（）AEnsure that the Ethernet encapsulations match on the interconnected router and switch ports.BEnsure that cables A and B are straight-through cables.CEnsure cable A is plugged into a trunk port.DEnsure the switch has power.EReboot all of the devices.FReseat all cables.
考题
单选题A cofferdam is（）.A
any deck below the main deck and above the lowest deckB
a member that gives fore-and-aft strengthC
made by placing two bulkheads a few feet apartD
a heavy fore-and-aft beam under the deck
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