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提问人：网友anonymity 发布时间：2022-01-07

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从供选择的答案中，选出最确切的解答。 MIDI enables people to use （1) computers and electronic musi

从供选择的答案中，选出最确切的解答。

MIDI enables people to use(1)computers and electronic musical instruments. There are actually three components to MIDI, the communications"(2)",the Hardware Interface and a distribution(3)called "Standard MIDI Files".In the context of the WWW, the most interesting component is the(4)Format. In principle,MIDI files contain sequences of MIDI Protocol messages. However, when MIDI Protocol(5)are stored in MIDI fles, the events are also time-stamped for playback in the proper sequence. Music delivered by MIDI files is the most common use of MIDI today.

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第1题

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The Rational Unified Process (RUP) is a software engineering process, which captures many of best practices in modern software development. The notions of(1)and scenarios have been proven to be an excellent way to capture function requirements. RUP can be described in two dimensions-time and content. In the time dimension, the software lifecycle is broken into cycles. Each cycle is divided into four consecutive(2)which is concluded with a well-defined(3)and can be further broken down into(4)-a complete development loop resulting in a release of an executable product,a subset of the final product under development, which grows mcrementally to become the final system. The content structure refers to the disciplines, which group(5)logically by nature.

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第2题

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SOCKS is a generic proxy protocol for ICP/IP-based networking, applications. SOCKS includes two(1), the SOCKS server and the SOCKS client. The SOCKS server is implemented at the application layer. The SOCKS client is implemented between applications and the(2)layer. When an application client needs to connect to an application server, the client connects to a SOCKS proxy server. The proxy server connects to the application server instead of the client, and(3)data between the client and the application server. For the application server, the proxy server is the(4). SOCKS is also one of the popular(5)to network firewalls. Because of its simplicity and flexibility, SOCKS has been used as generic application proxy in virtual private network (VPN), and for extranet applications.

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第3题

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(1)analysis emphasizes the drawing of pictorial system models to document and validate both existing and/or proposed systems. Ultimately, the' system models become the(2)for designing and constructing an improved system.(3)is such a technique. The emphasis in this technique is process-centered. Systems analysts draw a series ofprocess models called(4).(5)is another such technique that integrates data and process concerns into constructs called objects.

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第4题

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Networks can be interconnected by different devices. In the physical layer, networks can be connected by(1)or hubs, which just move the bits from one network to an identical network. One layer up we fine bridges and switches, which operate at data link layer. They can accept(2)，examine the MAC address and forward the frames to a different network while doing minor protocol translation in the process. In the network layer, we have routers that can connect two networks. If two networks have(3)network layer, the router may be able to translate between the packer formats. In the transport layer we find transport gateway, which can interface between two transport connections. Finally, in the application layer, application gateways translate message(4). As an example, gateways between Intemet E-mail and X.400 E-mail must(5)the E-mail message and change various header fields.

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第5题

从供选择的答案中，选出应填入下面叙述中______内的最确切的解答。

MIMD systems can be classified into(1)oriented systems, high-availability systems and response-oriented systems. The goal of(1)oriented multiprocess is to obtain high(1)(2)minimal computing cost. The techniques employed by multiprocessor operating systems to achieve this goal take advantage of an inherent processing versus input/output balance in the workload to produce(3)and(4)loading ofsystem(5)．

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第6题

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Melissa and Love Letter made use of the trust that exists between friends or colleagues. Imagine receiving an(1)from afriend who asks you to open. This is what happens with Melissa and several other similar Email(2). Upon running, such worms usually proceed to send themselves out to Email addresses from the victim's address book, previous Emails, web pages(3).

As administrators seek to block dangerous Email attachments through the recognition of well-known(4), virus writers use other extensions to circumvent such protection. Executable (.exe) files are renamed to .bat and .cmd plus a whole list of other extensions and will still run and successfully infect target users.

Frequently, hackers try to penetrate networks by sending an attachment that looks like a flash movie, which, while displaying some cute animation, simultaneously runs commands in the background to steal your passwords and give the(5)access to your network.

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第7题

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DOM is a platform-and language(1)API that allows programs and scripts to dynamically access and update the content, structure and style of WWW documents (currently, definitions for HTML and XML documents are part of the specification). The document can be further processed and the results of that processing can be incoporporated back into the presented(2). DOM is a(3)-based API to documents, which requires the whole document to be represented in(4)while processing it. A simpler alternative to DOM is the event-based SAX, which can be used to process very large(5)documents that do not fit into the memory available for processing.

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第8题

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The purpose ofthe requirements definition phase is to produce a clear, complete, consistent, and testable(1)of the technical requirements for the software product.

During the requirements definition phase, the requirements definition team uses an iterative process to expand a broad statement of the system requirements into a complete and detailed specification of each function that the software must perform and each(2)that it must meet. The starting point is usually a set of high-level requirements from the(3)that describe the project or problem.

In either case, the requirements definition team formulates an overall concept for the system and then defines(4)showing how the system will be operated, publishes the system and operations concept document and conducts a system concept review (SCR).

Following the SCR, the team derives(5)requirements for the system from the high level requirements and the system and operations concept. Using structured or object-oriented analysis the team specifies the software functions and algorithms needed to satisfy each detailed requirement.

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第9题

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