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名词解释题
系统发生树（Phylogenetic tree）
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命令“spanning-tree vlanvlan”的功能是( )。A) Catalyst 3500系统下配置生成树优先级B) Catalyst 6500系统下启用STPC) Catalyst 3500系统下启用STPD)上述说法都不对
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加快Catalyst 3548发生直接链路失效时的收敛速度，正确配置生成树可选功能的命令是( )。A) spanning-tree backbonefastB) spanning-tree porfast defaultC) spanning-tree uplinkfast max-update-rate 32000D) set span tree uplindfast enable rate 40
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看树看果实,看人看作为。
A、A tree is known by its fruit , and a man is known by his actions.B、A tree is known by its fruit , and a man is known by his act.
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加快Catalyst 3548发生直接链路失效时的收敛速度，正确配置生成树可选功能的命令是A．spanning-tree backbonefastB．spanning-tree portfast defaultC．spanning-tree uplinkfast max-update-rate 32000D．set spantree uplinkfast enable rate 40
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Catalyst 3500(Cisco IOS系统)中配置UplinkFast生成树可选功能的命令格式是——。A．set spantree uplinkfast enablecrB．set spantree uplinkfast enable ratestation—update—ratecrC．spanning—tree vlanvlanroot primaryD．spanning—tree uplinkfastcr·
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Catalyst 3500(Cisco．[OS系统)中配置PortFast生成树可选功能的命令格式是——。A．set spanning—tree portfastmod／portenableB．set spanning-tree portfastmod／portenableC．spanning—tree portfast defaultD．set spanning—tree portfastmod／portdefault
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MLlib中可以调用mllib.tree.DecisionTree类中的静态方法()训练回归树。
A.trainRegressorB.trainClassifierC.LogisticRegressionModelD.LabeledPoint
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命令“spanning-tree vlan”的功能是()。A.Catalyst3500系统下启用STPB.Catalyst6500系统下启用STPC.Catalyst3500系统下配置生成树优先级D.上述说法都
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Catalyst 6500(Catalyst OS(CatOS)系统)中配置Uplink Fast生成树可选功能的命令格式是( )。A．set spantree uplink fast enableB．spanning-tree uplink fastC．spanning-tree vlan root primaryD．spanning-tree uplink fast max-update-rate 0-32000
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资料：It’s easy to trace the evolution of the automobile.At most，we’re only talking about a few centuries of technological development，and most of the plans，prototypes and models are still around. With just a little research，you can easily trace the latest model electric hybrid back to its steam-powered ancestors.
Your family tree is probably a different matter. Even an extensive genealogy chart can only reach back so far，and mortality puts a rather strict limit on exactly how many “models” are still on the road. Humanity’s evolutionary progression is even more difficult. We still have plenty of living primate relatives，but many of the life forms that connect the evolutionary dots are long extinct.
Evolutionary biologists use several methods to decipher exactly how we came to be as we are.In fact，the field itself encompasses several different disciplines in addition to biology，like genetics，psychology，geology，archaeology linguistics，anthropology and primatology just to name a few. Naturally，paleoanthropology also plays a key role，as we have to turn to the fossil record for many clues about our ancient primate，human and nearly human ancestors.
While the fossil record by its very nature is incomplete，there’s no shortage of fossil evidence to link the planet’s varied life forms into a great tree of life， a chart that scientists call a phylogenetic tree. You can think of humans as the very tip of just one branch on that tree called “hominid.” Chimpanzees exist at the end of an adjoining branch called “panin.” Follow both the hominid and panin branch back about 5.4 million years， and you’ll find a point where scientists think the two converged from a single，common ancestor.
Fossil evidence helps scientists to reconstruct these trees，but so do morphological and genetic studlies. Genetic analysis has yielded striking similarities between chimps and humans. As such， scientists know a last common ancestor of chimps and humans existed，even if we’ve yet to determine the exact species. Yet paleoanthropologists have found numerous hominid fossils to bridge the evolutionary progression from that unknown common ancestor to modern humans. These finds include such famous East African fossils as Lucy（Australopithecus afarensis），which strengthened the importance of bipedalism in human evolution and proved an essential milestone on our way to modern Homo sapiens.
Fossil evidence for human evolution will never be complete，as fossils themselves are rare geologic occurrences.Nevertheless，by incorporating other scientific disciplines，we’re able to build an increasingly accurate picture of just what our evolutionary family tree consisted of.
Which statement is true，based on Para.3?A.Hominid and panin were humans ancestors 5.4 million years ago.
B.Chimpanzees existed at a branch of phylogenetic tree are called “hominid”.
C.Humans on phylogenetic tree analysis are supposed to be called “panin.”
D.Scientists think humans and Chimpanzees converged from a common ancestor，based on phylogenetic tree analysis.
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在单链路上联的接入交换机上部署环路预防策略时，需要做哪些生成树相关工作？（）A、上联口开启spanning-tree filterB、下联口开启spanning-tree filterC、下联口开启spanning-tree portfastD、下联口开启spanning-tree bpduguard
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单选题命令“spanning-tree vlan”的功能是（ ）。A
Catalyst 3500系统下启用STPB
Catalyst 6500系统下启用STPC
Catalyst 3500系统下配置生成树优先级D
上述说法都不对
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单选题能够将分布交换机配置为生成树的主根交换机的命令是（）。A
spanning-tree vlan vlan-id primaryB
spanning-tree vlan vlan-id root primaryC
spanning-tree root primaryD
spanning-tree bridge root
考题
名词解释题分子进化树（molecular evolutionary tree）
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