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A（71) is a data type whose major attributes are determined by the rules governing the inse

A(71) is a data type whose major attributes are determined by the rules governing the insertion and deletion of its elements. The only element that can be deleted or removed is the one that was inserted most(72). Such a structure is said to have a last-in/first-out (LIFO) behavior, or protocol.

A．stack

B．queues

C．pointer

D．record

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第1题

A（71)is a data type whose major attributes are determined by the rules governing the inser

A(71)is a data type whose major attributes are determined by the rules governing the insertion and deletion of its elements. The only element that can be deleted or removed is the one that was inserted most(72). Such a structure is said to have a last-in/first-out(LIFO)behavior, or protocol.

A．stack

B．queues

C．pointer

D．record

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第2题

In data communication, data link is those parts of two data terminal equipments that are c

ontrolled by a protocol along with the(71) data circuit, which together enable data(72). So-called protocol means, in short, a set of rules that determines the behavior. of functional units in achieving communication.Data circuit, however, consists of a pair of(73) transmission channels that provides a means of two-way data transmission. Between data switching exchanges, the data circuit may or may not include data circuit-terminating equipment (DCE), depending on the type of(74) used at the data switching exchange. Between a data station and a data switching exchange or data concentrator, the data circuit includes the DCE at the data station end, and may include equipment(75) to a DCE at the data switching exchange or dam concentrator location.

A．handshaking

B．interconnecting

C．linkage

D．joining

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第3题

An embedded operating system is the（71)program that manages all the other programs in an e

An embedded operating system is the(71)program that manages all the other programs in an embedded device after initial load of programs by a(an)(72). It normally guarantees a capability within a specified(73)size and(74)constraint as well as with application programs. It also n0rmalty has small foot print including initial boot loader, OS kernel, required device drivers,(75)for the user data and so forth. It has very-likely structure of a normal operating system however mainly differentiated by some factors such as type of pre-installed device, functional limits, taking designed job only.

A．hardware

B．business

C．software

D．external

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第4题

● An embedded operating system is the（71） program that manages all the other programs in a

n embedded device after initial load of programs by a(an) （72）. It normally guarantees a certain capability within a specified（73） size and （74） constraint as well as with application programs. It also normally has small foot print including initial boot loader, OS kernel, required device drivers, （75） for the user data and so forth. It has very-likely structure of a normal operating system however mainly differentiated by some factors such as type of pre-installed device, functional limits, taking designed job only.

（71）A. hardware B. business C. software D. external

（72）A. driver B. application C. kernel D. boot loader

（73）A. data B. storage C. bus D. CPU

（74）A. time B. format C. controller D. packet

（75）A. JAFFS B. format C. file systems D. protocol

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第5题

When you think of the Internet, you probably think of ".com." Just what do those three let

ters at the end of a World Wide Web address mean？ Every computer that hosts data on the Internet has a(71)numerical address. For example, the numerical address for the White House is 198.137.240.100. But since(72)people want to remember long strings of numbers, the(73)was developed. It is a critical part of the Internet's technical infrastructure, correlates a numerical address to a word. To(74)the White House website, you could type its numerical address into the address box of your web browser. But most people prefer to use "www. whitehouse. gov." In this case, the domain name is(75).

A．unique

B．isolated

C．similar

D．same

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第6题

One of the difficulties in building an SQL,like query language for the Web is the absence

of a database(71) for this huge, heterogeneous repository of information. However, if we are interested in HTML documents only, we can construct a virtual schema from the implicit structure of these files. Thus, at the highest level of(72) , every such document is identified by its Uniform. Resource Locator(URL), has a(73) and a text. Also, Web servers provide some additional information such as the type, length, and the last modification date of a document. So, for data mining purposes, we can consider the set of all HTML documents as a relation:Document(url, title, text, type, length, modif)Where all the(74) are character strings. In this framework, an individual document is identified with a(75) in this relation. Of course, if some optional information is missing from the HTML document, the associate fields will be left blank, but this is not uncommon in any database.

A．schema

B．platform

C．module

D．relation

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第7题

In the data link layer, the data unit is called（71)．A．flameB．PacketC．SignalD．APDU

In the data link layer, the data unit is called(71)．

A．flame

B．Packet

C．Signal

D．APDU