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Both bus and tree topologies are characterized by the use of multipoint(71).For the bus,al

Both bus and tree topologies are characterized by the use of multipoint (71) .For the bus,all stations attach,through appropriate hardware (72) known as a tap,directly to a linear transmission medium,or bus.Full-duplex operation between the station and the tap allows data to be transmitted onto the bus and received from the (73) .A transmission from any station propagates the length of the medium in both directions and can be received by all other (74) .At each end of the bus is a (75) ,which absorbs any signal,removing it from the bus.

(71)

A.medium

B.connection

C.token

D.resource

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更多“Both bus and tree topologies a…”相关的问题
第1题
Both bus and tree topologies are characterized by the use of multipoint().A.mediumB.connec

Both bus and tree topologies are characterized by the use of multipoint().

A.medium

B.connection

C.token

D.resource

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第2题

As the bus came round the corner, it ran () a big tree by the roadside.

A.into

B.on

C.over

D.up

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第3题
A.星型(star)B.环型(ring)C.树型(tree)D.总线型(bus)

A.星型(star)

B.环型(ring)

C.树型(tree)

D.总线型(bus)

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第4题
Many years ago when the summers seemed longer and life was less complicated, we had re
nted a cottage 31 a river in the heart of the country 32 the whole family was going to 33 a three-week holiday. There were four of us: me, Mum and Dad, and Mum‟s sister, Auntie June. Oh, and I mustn‟ t forget to 34 Spot, our little dog. I was 35 to go off by myself all day, 36 I promised to be careful and took Spot with me for 37.

One day I was out fishing with Spot when we heard a lot of shouting in the 38 followed by a scream and splash. I was a bit 39 so I called Spot and we both hid 40 a bush where we could see but not be 41 . After a few moments, a straw hat came drifting down the river, followed by an oar, a picnic basket and 42 oar. Then came the rowing boat itself, but it was 43 upside down ! A few seconds later my Dad and Auntie June came running 44 the river bank, both wet 45 . Spot started barking so I came out of hiding and said hello. My Dad got really angry 46 me for not trying to catch the boat as it went past. Luckily, 47 , the boat and both the oars had been caught by an overhanging tree a little further downstream, but not the hat or picnic basket. So I had to let them 48 my sandwiches. Dad and Auntie June both made me 49 not to tell Mum what had happened 50 she would be worried.

31.A.onB.byC.inD.across

32.A.whereB.thatC.whichD.when

33.A.planB.manageC.consumeD.spend

34.A.mentionB.bringC.sendD.lead

35.A.forcedB.orderedC.allowedD.encouraged

36.A.evenifB.providedC.lestD.asif

37.A.instructionB.inspectionC.protectionD.supervision

38.A.placeB.spaceC.skyD.distance

39.A.scaredB.amusedC.excitedD.disturbed

40.A.besideB.beforeC.behindD.beneath

41.A.seenB.viewedC.watchedD.observed

42.A.theotherB.eachotherC.anotherD.oneanother

43.A.rollingB.floatingC.circlingD.sinking

44.A.downB.besideC.toD.on

45.A.withinB.overC.underD.through

46.A.atB.againstC.withD.to

47.A.moreoverB.thenC.thereforeD.however

48.A.spareB.shareC.borrowD.divide

49.A.agreeB.decideC.guaranteeD.promise

50.A.exceptB.incaseC.inorderthatD.onconditionthat

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第5题
(填句补文)marine it's that time of year when you start thinking about taking a vacation

Marine it's that time of year when you start thinking about taking a vacation.Part of the work involves choosing an ideal location while the hard part can be making travel arrangements. (26) While those methods may be your first thoughts, train travel is a wonderful option that sometimes gets overlooked.

In recent years, train travel has increased greatly. A 2010 poll said 62 percent of Americans would probably choose to travel by train. The group responsible for most of the increase in train travel is senior citizens.(27)

The first advantage of traveling by train is not having to worry about driving or the stresses of flying. Today, taking a plane can be quite annoying.(28) In addition, some aren't fond of heights and instead enjoy feeling safe on the ground.

The second advantage of train travel is it allows passengers to enjoy beautiful scenes during the fide. (29) What's more, people can enjoy drinks, food, movies, and games on the train.

(30) It may bring back wonderful memories to those who rode trains with their families as children. Overall, train travel is both comfortable and relaxing. It is a wonderful way of traveling for senior citizens.

A. You don't have to keep your eyes on the road.

B. And they choose trains for a number of reasons.

C. Traveling by train can be t/ring and time-consuming.

D. Finally, railroad travel can be a timeless option for seniors.

E. How are you going to get there perhaps by plane, car, or bus?

F. One needs to check in bags and be subject to various security measures.

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第6题
tree的复数形式是trees()
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第7题
当组播主机从rendezvous point接收包,哪种类型的树将会加入?()

A.Shared tree

B.Source-based tree

C.Wildcard tree

D.Flooding tree

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第8题
如果你想说:“房子前面有一棵树”时,应该怎么说()

A.There is a tree behind the house

B.There is a tree in front of the house

C.There is a tree front of the house

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第9题
sapling()

A.work hard

B.young tree

C.young animal

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