虚拟现实（Virtual Reality）它是用计算机营造出一种虚拟的世界，让你感觉它就像是真的一样，下面虚拟现实名称错误的是（）

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• VLAN（Virtual Local AreaNetwork）即虚拟局域网，是一种通过将局域网内的设备逻辑地而不是物理地划分成一个个网段从而实现虚拟工作组的技术。

  A . 正确 B . 错误

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• 船舶设计中主要是用船型尺度，它是计算（）、船舶系数和水对船舶阻力时使用的尺度。

  A . 船舶吨位 B . 船舶稳性 C . 吃水差 D . 干舷高度

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• VLAN（Virtual Local Area Network）即虚拟局域网是一种通过将局域网内的设备逻辑而不是物理划分成一个个网段从而实现虚拟工作组的技术。

  A . 正确 B . 错误

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• 由于Virtual-template、Dialer、Tunnel等接口是虚拟的接口，因此这些接口不加入到域中也可以正常收发报文。（）

  A . 正确 B . 错误

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• 虚拟内存（Virtual Memory）技术实际是在硬盘上开辟一个存储空间当作内存使用。

  A . 正确 B . 错误

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• 虚拟现实（virtual reality，VR）或称虚拟环境（virtual environment，VE）是由计算机生成的、具有临场感觉的环境，它是一种全新的人机交互系统。

  A . 正确 B . 错误

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• VPN即Virtual Private Network虚拟私用网，是利用Internet来传输（）而形成的逻辑网络。

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• 虚拟物流 virtual logistics

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• LVDI（Lenovo Virtual Desktop Infrastructure）是联想与Citrix、VMware强强联手，鼎力打造的主要面向企、事业单位基础架构的端到端的桌面虚拟化解决方案.

  A . 正确 B . 错误

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• 虚函数是用virtual关键字说明的成员函数。

  A . 正确 B . 错误

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• 虚拟现实，就是Virtual Reality，简称____。

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• 原文:虚拟的 译文: ______第一空： virtual

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• We can infer that current virtual reality devices ______.

  A．still need improving to create a perfect virtual world B．are already perfect to create a virtual world C．are unable to create a virtual world D．are harmful to users of virtual reality

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• “当前现实树”（Current Reality Tree)的检测逻辑机制包括（)

  A．当前现实树中的箭头表示实体间的充分的关系 B．充分的意思就是这个原因足以引起这个结果 C．不满足充分关系的实体可以用箭头连接 D．两个实体之间是“如果-那么”的关系

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• KVM（Kernel－based Virtual Machine)虚拟机通过格式转换后可以运行在其他虚拟化平台上。（)

  是 否

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• Surgeons will soon be able to enter the eye to carry out operations—at least in a virtual sense. Techniques derived from virtual reality the computer system that immerses operations in an artificial computer-generated world—will allow surgeons to feel as if he could see the in side of the eye during an operation, creating the illusion that they are actually there.

  Researchers at the Biorobotics (生物机械技术)Laboratory of McGill University in Montreal are building a robot , known as Micro Surgery robot-1(MSR- I for short), that will perform. delicate operations under the control of a human surgeon. The robot is specifically designed for performing eye surgery but could have other applications, such as the removal of brain tumors. The system could also be used to allow surgeons and their students to practise simulated surgery that feel like the real thing- without the real consequences for the patients. During the operations, the surgeon manipulates a set of control known as the master. These are connected through a high- performance computer to the robot. Both the master and the robot have two limbs, When the surgeon moves the masters' limbs, the robots limbs move in exactly the same way, except that the movements can be scaled down as much as a thousand times. This will eliminate hand tremor and poor accuracy and thus reduce the damage to the eye that can occur with present microsurgery techniques. Each of the robots limbs has a minimum movement of one micrometer---more than one hundred times the precision of the human hand. The computer also creates a three - dimensional robot' s eye view of the inside of the eye that the surgeon can see by wearing a virtual reality helmet (虚拟现实头盔) that has a small lens in front of each eye. To provide the surgeon with such a realistic experience, MSR-I must be able to move rapidly, but this requires extremely fast computing. To handle the computational demands of instant interaction, the McGill team is constructing its own parallel-processing computer., It is al so studying areas such as muscle mechanism, artificial intelligence and optics, and has a already built another micro robot MR- I, capable of manipulating a single living cell. Although commercial applications of the new system are not expected for several years, its basic mechanical components will be ready for testing in a few months, "The day when micro robots will be able to perform. surgery without human intervention is many years away," says Hunter, "in the meantime , a system such as MRS-I is a necessary precursor." The so-called "virtual reality "mentioned in this passage is actually. A．a surgical tool used for operations B．a computer system used to produce life- like illusions C．a new kind of applications in a visual technology. D a way to carry out operations in a visual sense

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• During virtual reality operations, the surgeon can have a better view of the cuts in the body because______.

  A．he is looking at the cuts on a computer screen B．the cuts can be examined from different angles C．the cuts have been highly magnified D．he is wearing 3-D glasses

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• 部署互联网协议安全虚拟专用网（Internet Protocol Security Virtual Private Network，IPsecVPN）时，以下说法正确的是（）

  A.配置MD5安全算法可以提供可靠地数据加密 B.配置AES算法可以提供可靠的数据完整性验证 C.部署IPsecVPN网络时，需要考虑IP地址的规划，尽量在分支节点使用可以聚合的IP地址段，来减少IPsec安全关联（Security Authentication，SA）资源的消耗 D.报文验证头协议（Authentication Header，AH）可以提供数据机密性

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• 虚拟化（英语: Virtualization） 是云计算的底层结构。它是一.种资源管理技术，是将计算机的各种实体资源，如服务器、网络、内存及存储等，予以抽象、转换后呈现出来，打破实体结构间的不可切割的障碍，使用户可以比原本的组态更好的方式来应用这些资源。对于虚拟实例的实现方式，包括下面几类（）

  A．全虚拟化 B．半虚拟化 C．硬件辅助虚拟化 D．分布式虚拟化

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• 【判断题】JVM是java虚拟机（JVM Java Virtual Machine)，java程序需要运行在虚拟机上，不同平台有自己的虚拟机，因此java语言可以跨平台。

  A．Y.是 B．N.否

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• VRRP （Virtual Router Redundancy Protocol) 虚拟路由冗余协议 名词解释

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• 84、虚函数是用virtual关键字说明的成员函数。

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• Computers will become more advanced and they will also become easier to use.Improved speed recognition will make the operation of a computer easier. Virtual reality（虚拟现实）, the technology of（请作答此空） wit

  A．interact B． interacting C． communicate D． Using

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• 2、现实和梦想不同，但我们可以努力将一些梦想变为现实。 Though reality is different from dreams, we can make efforts to turn some of the dreams into ___________.

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