ping 10.12.0.1 -t时 ,查看统计信息的命令为...

某计算机IP地址为192.168.1.68，网关为192.168.1.254。该计算机现在无法访问IP地址为202.120.45.12的主机，若要测试该计算机在其网段内是否工作正常，应使用(60)命令。

A．ping 192.168.1.254

B．ping 192.168.1.68

C．ping 202.120.45.12

D．ping 127.0.0.1

● 某计算机 IP 地址为 192.168.1.68，网关为 192.168.1.254。该计算机现在无法访问IP 地址为202.120.45.12的主机，若要测试该计算机在其网段内是否工作正常，应使用 （60） 命令。

（60）

A．ping 192.168.1.254

B．ping 192.168.1.68

C．ping 202.120.45.12

D．ping 127.0.0.1

某计算机的IP地址为192.168.1.68，网关为192.168.1.254。该计算机现在无法访问IP地址为202.120.45.12的主机，若要检测该计算机在其网段内是否工作正常，应使用 ______命令。

A．ping 192.168.1.254

B．ping 192.168.1.68

C．ping 202.120.45.12

D．ping 127.0.0.1

A．

B．

C．

D．

阅读下列技术说明，根据要求回答问题1～问题4。

[说明]

某单位局域网拓扑结构如图4-14所示，交换机Switch1～Switch3互相通过快速以太网端口连接。在交换机Switch2上创建有基于端口的VLAN，其中f0/3属于VLAN 3，f0/4属于VLAN5。交换机Switch3上也创建有基于端口的VLAN，其中f0/3属于VLAN 3，f0/4属于VLAN5。PC1、PC2、PC23、PC24的 IP地址分别为192.168.1.11/24、192.168.1.12/24、192.168.1.13/24、192.168.1.14/24。

交换机Switch2和Switch3中都创建了相应的VLAN，但管理员发现PCI主机可以ping通PC2主机， Switch2中的VLAN信息如图4-15所示。

造成这一故障现象的原因可能是什么?如何修改相关配置以排除这一故障现象?

A.处于网络A中的某主机，其IP地址为10.1.1.12，子网掩码为255.255.0.0

B.处于网络A中的某主机，其IP地址为10.1.2.16，子网掩码为255.255.0.0

C.处于网络B中的某主机，其IP地址为10.1.2.14，子网掩码为255.255.255.0

D.处于网络A中的某主机，其IP地址为10.1.1.8，子网掩码为255.255.255.0

You are unable to telnet to a router at address 203.125.12.1 from a workstation with the IP address 203.125.12.23. You suspect that there is a problem with the IP protocol stack in your PC. Which of the following actions is most likely to confirm your diagnosis?

A. ping 127.0.0.0

B. ping 203.125.12.1

C. telnet 127.0.0.1

D. ping 127.0.0.1

E. tracert 203.125.12.1

F. None of the above

In the 20th century the planets population doubled twice. It will not double even once in the【C1】______century, because birth rates in much of the world have【C2】______steeply. But the number of people over 65 is set to【C3】______within just 25 years. This shift in the structure of the population is not as momentous as the【C4】______that came before. But it is more than enough to reshape the world economy. 【C5】______the UNs population【C6】______, the standard source for demographic estimates, there are around 600m people aged 65 or older【C7】______today. That is in itself remarkable: the author Fred Pearce claims it is【C8】______that half of all the humans who have ever been over 65 are alive today. But【C9】______a share of the total population, at 8% , it is not that【C10】______to what it was a few decades ago. By 2035 ,【C11】______, more than 1.1 billion people—13% of the population—will be above the age of 65. This is a【C12】______result of the dropping birth rates that are slowing overall population growth: they mean there are【C13】______fewer young people around. The "old-age dependency ratio"—the ratio of old people to those of working age—will【C14】______even faster. In 2010 the world had 16 people aged 65 and over for every 100 adults between the ages of 25 and 64,【C15】______the same ratio it had in 1980. By 2035 the UN【C16】______that number to have risen to 26. In rich countries it will be much higher. Japan will have 69 old people for every 100 of working age by 2035, Germany 66.【C17】______America, which has a relatively high【C18】______rate, will see its old-age dependency rate rise by more than 70% , to 44. Developing countries,【C19】______todays ratio is much lower, will not see absolute levels rise that high:【C20】______the proportional growth will be higher. Over the same time period the old-age dependency rate in China will more than double from 15 to 36. Latin America will see a shift from 14 to 27.

【C1】

A．previous

B．prosperous

C．current

D．chronic

Interruption, more surely than anything else, kills conversation. The best of talkers interrupt 【C1】______ in conversation. However, the 【C2】______ interruption of the habitual interrupter and the unintentional, conscious interruption of the【C3】______talker are two very different things. All habitual interrupters are totally unaware that they continually【C4】______ speeches of their converses and literally knock their very words back【C5】______their mouths. Inability to【C6】______is responsible for one phase of interruption to conversation. It is the 【C7】______eye that tells ones words have not been heard. " The person next to you must be 【C8】______by my conversation, for it is going into one of his ears and out of the other," said a talker to an inattentive dinner-companion whose absent-minded and【C9】______replies had been snapping the thread of the thought【C10】______it grew intolerable. Because it often【C11】______ from kind thought as from arrogance, sometimes we can see a 【C12】______ undesirable phase of interruption takes place when conversationalist is so anxious to prove his quickness of perception【C13】______he assumes to know what you are going to say before you have finished your sentence in your own mind. He puts his【C14】______ on your arguments before you are【C15】______stating them. His interpretation is【C16】______often exactly the opposite of your own as it is【C17】_____. Right or wrong, the explanation serves only【C18】______ interrupt the sequence of thought. This can hardly prove ones【C19】______; on the contrary, such a habit may be a【C20】______to ones powers.

【C1】

A．occasionally

B．frequently

C．regularly

D．repeatedly

Could a hug a day keep the doctor away? The answer may be a resounding "yes!" 1 helping you feel close and 2 to people you care about, it turns out that hugs can bring a 3 of health benefits to your body and mind. Believe it or not, a warm embrace might even help you 4 getting sick this winter.

In a recent study 5 over 400 health adults, researchers from Carnegie Mellon University in Pennsylvania examined the effects of perceived social support and the receipt of hugs 6 the participants&39; susceptibility to developing the common cold after being 7 to the virus .People who perceived greater social support were less likely to come 8 with a cold ,and the researchers 9 that the stress-reducing effects of hugging 10 about 32 percent of that beneficial effect. 11 among those who got a cold, the ones who felt greater social support and received more frequent hugs had less severe 12 .

"Hugging protects people who are under stress from the 13 risk for colds that&39;s usually 14 with stress," notes Sheldon Cohen, a professor of psychology at Carnegie. Hugging "is a marker of intimacy and helps 15 the feeling that others are there to help 16 difficulty."

Some experts 17 the stress-reducing , health-related benefits of hugging to the release of oxytocin, often called "the bonding hormone" 18 it promotes attachment in relationships, including that between mother and their newborn babies. Oxytocin is made primarily in the central lower part of the brain , and some of it is released into the bloodstream. But some of it 19 in the brain, where it 20 mood, behavior. and physiology.

A.Unlike

B.Besides

C.Despite

D.Throughout

A.connected

B.restricted

C.equal

D.inferior

A.choice

B.view

C.lesson

D.host

A.recall

B.forget

C.avoid

D.keep

A.collecting

B.involving

C.guiding

D.affecting

A.of

B.in

C.at

D.on

A.A.devoted

B.B.exposed

C.C.lost

D.D.attracted

A.across

B.along

C.down

D.out

A.calculated

B.denied

C.doubted

D.imagined

A.served

B.required

C.restored

D.explained

A.Even

B.Still

C.Rather

D.Thus

A.defeats

B.symptoms

C.tests

D.errors

A.minimized

B.highlighted

C.controlled

D.increased

A.equipped

B.associated

C.presented

D.compared

A.assess

B.moderate

C.generate

D.record

A.in the face of

B.in the form of

C.in the way of

D.in the name of

A.transfer

B.commit

C.attribute

D.return

A.because

B.unless

C.though

D.until

A.emerges

B.vanishes

C.remains

D.decreases

A.experiences

B.combines

C.justifies

D.influences

请帮忙给出每个问题的正确答案和分析，谢谢！