当信息从信源向信宿流动时可能会受到攻击。其中中断攻击是破坏系统资源,这是对 网络__

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问题:

当信息从信源向信宿流动时可能会受到攻击。其中中断攻击是破坏系统资源,这是对 网络_________性的攻击。

考点:计算机等级考试网络技术国家计算机三级(网络技术)71
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图示是汽车的速度计,某同学在汽车中观察汽车速度计指针位置的变化,发现汽车静止时指针指示在如图甲所示的位置,汽车起动16S后指针指示在如图乙所示的位置,若汽车在这段段时间内做匀加速直线运动,那么汽车的加速度约为(  )

A.11m/s2

B.5.0m/s2

C.1.4m/s2

D.0.6m/s2

题型:填空题

病历摘要:患者男性,13岁。因反复浮肿,大量蛋白尿5年入院。

下一步的治疗措施是()

A.大剂量激素冲击

B.强的松足量治疗

C.干扰素

D.贺普丁

E.酶酚酸酯

F.环磷酰胺

G.小剂量激素

题型:填空题

下列关于乙肝传染源的管理正确的有()

A.对病人进行登记及统计

B.对病人和家属进行消毒、隔离和预防的指导

C.病人的食具、漱洗用具要与健康人分开

D.病毒携带者,如无明显症状可以从事饮食业工作

E.密切接触者应接种乙肝疫苗

题型:填空题

With the widespread use of the personal computer, many authorities in the field of (56) have pointed out the need for computer literacy.
Unfortunately, there is no (57) agreement as to what the term "computer literacy" means. Some feel that computer literacy means knowing how to make the computer "compute"; that is knowing how to program computers in one or more programming languages.
Others feel that knowing how to program is merely a small segment of computer literacy. These people (58) the major emphasis in schools should be on teaching how to effectively use the many software packages that are available.
Still others suggest that computer literacy education is not required. They suggest that computers are being so rapidly integrated into our society that using a computer will be as (59) as using a telephone or a video tape recorder, and that special education will not be necessary. (60) of one’s definition of computer literacy, it is recognized by most that learning to use a computer is indeed an important skill in modern society.

A.equal

B.universal

C.different

D.difficult

E.common

F.big

题型:填空题

使用一个动滑轮吊起一个10公斤重的物体,我们可以省多少公斤的力?

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