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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