在“netstat -r”的执行结果中,目的网络地址127.0.0.0、172.16

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问题:

在“netstat -r”的执行结果中,目的网络地址127.0.0.0、172.16.18.0、172.16.255.255、224.0.0.0、255.255.255.255分别代表什么网络

考点:计算机软件水平考试初级网络管理员初级网络管理员下午试题
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下列有关实验操作、现象和解释或结论都正确的是[ ]

实验操作 
现象
解释或结论
A.在试管中的无色溶液中滴加稀NaOH溶液,将湿润的红色石蕊试纸置于试管口  试纸不变蓝原溶液中无
NH4
B.向AgI沉淀中滴入稀KCl溶液 有白色沉淀出现Ksp(AgCl) >Ksp(AgI)
C.向淀粉溶液中加入稀H2SO4,加热几分钟,冷却后再加入新制Cu(OH)2浊液,加热 无红色沉淀生成 淀粉没有水解成葡萄糖
D.pH均为1的盐酸、醋酸溶液分别用蒸馏水稀释m倍、n倍后测pH值
pH相同
m<n
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晶体管保护对直流电源有哪些要求?电压标准是什么?直流电源过高或过低对保护有哪些影响?

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单排脚手架的小横杆的一端,应用直角扣件固定在大横杆上,另一端应插入墙内,插入长度不应小于()mi11。

A.140

B.160

C.180

D.200

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Kevin Hines, a manic-depressive, was 19 and in one of his weekly downswings on an overcast Monday morning in 2000. He went to the nearby Golden Gate Bridge to kill himself mostly because, with only a four-foot (1.2-metre) railing to leap, "I figured it was the easiest way." He dived over, but flipped and hit the water at 75mph with his feet first. His legs were crushed, but he somehow stayed conscious and started paddling with his upper body until the Coast Guard fished him out.

Mr. Hines is one of 26 people who have survived suicide attempts at the bridge, but 1 223 are known to have succeeded (i. e., were seen jumping or found floating). People are throwing themselves off the bridge at the rate of two a month, which makes it the most popular place in the world for suicides. One book on the subject says that the Golden Gate is "to suicide what Niagara Falls is to honeymooners".

Many San Franciscans think that the solution is to emulate the Empire State Building, the Sydney Harbour Bridge, the Eiffel Tower, St. Peter’s basilica and other such places and put up a simple barrier. This, however, is a decision for the 19 board members of the Golden Gate Bridge, Highway and Transportation District, an entity that oversees the bridge itself and the buses and ferries that operate in the area. Most of its revenues’ come from tolls and fares, and the district loses money. A barrier would cost between $15 million and $ 25 million.

So the Psychiatric Foundation of Northern California, which has adopted the barrier as its cause, considers it a success that the board has merely allowed a feasibility study, for which various private and public donors have raised

$ 2 million. Mel Blaustein, a director at the foundation, has heard several arguments against a barrier over the years-too ugly, too expensive, and so forth--but the most persistent has been that people would simply kill themselves somewhere else, so why bother.’ This is nonsense, he says, "Most suicides are impulsive and preventable." A bridge without a barrier, adds Pat Hines, Kevin’s father, is "like leaving a loaded gun in the psychiatric ward.\

What will the author mention after Paragraph 4()

A. Some examples that bridges with barriers saved many people’s lives

B. Some suicides were successfully prevented

C. Some barriers over bridges are accepted both ornamentally and financially

D. Some barriers over bridges are in progress

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十六大报告指出,要促进人的全面发展,形成全民学习、终身学习的()

A.小康社会

B.信息化社会

C.学习型社会

D.社会主义社会

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