2006年4月自考02368通信英语历年真题及答案

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2006年4月自考02368通信英语历年真题及答案

1、In addition to the text to be transmitted in message switching,a_____ comprises a header and a checksum.()

A.unit

B.block

C.message

D.datum

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2、Many observers believe that the wideband subscriber loop systems would ideally use______.()

A.coaxial cable

B.wire

C.optical fibre

D.open-wire

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3、The______ of your use of the Internet is exchanging messages or obtaining information.()

A.method

B.direction

C.service

D.goal

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4、The most commonly used network______ is electronic mail.()

A.service

B.entertainment

C.version

D.resource

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5、Once the message is entirely received,the message processor examines its header,and accordingly decides on the next outgoing channel______ which to transmit it.()

A.by

B.at

C.for

D.on

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6、At the receiving end of an asynchronous serial data link,the receiver continually______ the line looking for a start bit.()

A.modulates

B.investigates

C.observes

D.monitors

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7、The operator of a local telephone switchboard had an option to transmit an optical or______ signal for the searched person over a wired network.()

A.acoustical

B.explosive

C.practical

D.integrated

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8、The primary emphasis,however,has been the______ of services rather than a simple replacement of existing equipment.()

A.maximum

B.enhancement

C.encouragement

D.propagation

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9、Each of these networks was specially designed for that specific service and is often not at all______ to transport another service.()

A.capable

B.practical

C.applicable

D.considerable

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10、A network capable of transporting all types of services will be able to adapt itself______ changing or new needs.()

A.for

B.to C on

C.with

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11、In the long term perspective cellular systems,using a(n)______ technology will become the universal method of telecommunication.()

A.circuit

B.analogue

C.message

D.digital

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12、The technological progress in the miniaturization of electronic circuitry in the early 1950s resulted______ the explosion of many new types of paging systems using wireless transmission.()

A.from

B.with

C.by

D.in

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13、The transport system adopted in SDH is analogous______ a road transport system.()

A.with

B.to

C.as

D.like

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14、Although telecommunication is the rationale for most of the current interest in fibre optics,this was not the______ during the early days of the technology. ()

A.key

B.case

C.issue

D.view

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15、Fibres designed for low dispersion at 1.55 um wavelength,which corresponds ______ minimum fibre loss,are now commonly used in long distance transmission. ()

A.with

B.for

C.to

D.in 1

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