单选题According to the text, the laser can ______.Astandardize telephone cablesBremove communications jamsCimprove the quality of human voicesDincrease the capacity of communications

单选题
According to the text, the laser can ______.
A

standardize telephone cables

B

remove communications jams

C

improve the quality of human voices

D

increase the capacity of communications


参考解析

解析:
细节题。通过关键句,原文第二段“telephone companies are now using laser light signals to transmit telephone calls through extremely small cables that are capable of carrying many more transmissions than the standard telephone cables.”可知,利用激光传递信号的声音比普通的电话电缆要多很多,这样通讯的传输能力就增强了。其他选项均不符合题意,故正确的答案为D。

相关考题:

The Communications Management Plan should contain the following:A Communications policyB Communications mediaC Reporting channelsD Selection of appropriate media to meet specific needsE All of the above

Techniques that can improve communication include:A establishing a single, one-way communications channelB avoiding face-to-face communicationC using redundancy (i.e. saying it two different ways) whenever possibleD disregarding the sensitivity of your receiverE All of the above.

195 Techniques that can improve communication include:A. establishing a single, one-way communications channelB. avoiding face-to-face communicationC. using redundancy (i.e. saying it two different ways) whenever possibleD. disregarding the sensitivity of your receiverE. All of the above

According to the text, what is the major cause of the flooding spam? 【 】A.Companies rely on e-mail for communications.B.More people in the world communicate by e-mail.C.Many computer viruses contain spam e-mail.D.More advertisers begin to promote sales through spam.

● Office (74) is the application of the computer and communications technology to improve the productivity of office workers.(74)A. Tool B. Automation C. Device D. FAX

Office ______ is the application of the computer and communications technology to improve the productivity of office workers.A.ToolB.AutomationC.DeviceD.FAX

Which Cisco collaboration product line will reduce TCO. Improve the user experience and productivity, and increase business relevance?() A.customer careB.conferencingC.messagingD.telepresenceE.IP communications

Why do the American doctors think of using laser light to treat heart disease?A.Beeause laser light is quite powerful.B.Because laser light is penetrating.C.Because laser light can destroy the blocking materials in human’s artery.D.Because laser light can travel through the human body.

● Office (74) is the application of the computer and communications technology to improve the productivity of office workers.(74)A. ToolB. AutomationC. DeviceD. FAX

When can routine communications be resumed on a frequency or channel on which radio silence has been imposed ________.A.After determining that the frequency or channel appears to be no longer in useB.After determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communicationsC.After the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concludedD.Routine communications can resume if,in the Master's opinion,communications on that frequency or channel will not interfere with emergency communications

Quality of service is analyzed at which service component within the Cisco Unified Communications plan phase()A、Network Readiness AssessmentB、Application Readiness AssessmentC、Site Readiness AssessmentD、Operation Readiness Assessment

Which Cisco collaboration product line will reduce TCO. Improve the user experience and productivity, and increase business relevance?()A、customer careB、conferencingC、messagingD、telepresenceE、IP communications

Which phase includes conducting Cisco Unified Communications network traffic analysis and capacity planning in order to ensure high availability()A、DesignB、PrepareC、MaintainD、Optimize

Which three deployment scenarios does Cisco Configuration Assistant support? ()A、 Cisco SR 500 in secure router mode, acting as a front end for Cisco Unified Communications 500B、 centralized Cisco Unified Communications Manager BE with Cisco Unified Communications 500 in SRST modeC、 Cisco SR 500 teleworker with Cisco Unified Communications 500 as VPN serverD、 multi-site VPN with Cisco Unified Communications 500 platformsE、 redundant Cisco Unified Communications 500 with primary-to-backup failoverF、 Cisco Unified Communications 500 to Cisco Unified Communications Manager SIP trunk

单选题In which of the following phases can you ensure that the new Cisco Unified Communications solution is integrated without disrupting the existing network()AOperateBPlanCDeployDImplement

单选题Which Cisco collaboration product line will reduce TCO. Improve the user experience and productivity, and increase business relevance?()Acustomer careBconferencingCmessagingDtelepresenceEIP communications

单选题Hancock’s study focuses on _____.Athe consequences of lying in various communications mediaBthe success of communications technologies in conveying ideasCpeople’s preferences in selecting communications technologiesDpeople’s honesty’s levels across a range of communications media

单选题Emotional intelligence is important because ______.Ait can increase the logical capacity of the computerBit can raise the mechanic capacity of the computerCit can eliminate all the defects of the computerDit can improve user-computer communication

单选题When can routine communications be resumed on a frequency or channel on which radio silence has been imposed? ()AAfter determining that the frequency or channel appears to be no longer in useBAfter determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communicationsCAfter the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concludedDRoutine communications can resume if,in the Master's opinion,communications on that frequency or channel will not interfere with emergency communications

多选题Which three deployment scenarios does Cisco Configuration Assistant support? ()ACisco SR 500 in secure router mode, acting as a front end for Cisco Unified Communications 500Bcentralized Cisco Unified Communications Manager BE with Cisco Unified Communications 500 in SRST modeCCisco SR 500 teleworker with Cisco Unified Communications 500 as VPN serverDmulti-site VPN with Cisco Unified Communications 500 platformsEredundant Cisco Unified Communications 500 with primary-to-backup failoverFCisco Unified Communications 500 to Cisco Unified Communications Manager SIP trunk

单选题Which phase includes conducting Cisco Unified Communications network traffic analysis and capacity planning in order to ensure high availability()ADesignBPrepareCMaintainDOptimize

单选题What is the name of the Cisco industry-leading small business unified communications solution? ()A Cisco IP Communications SystemB Cisco Integrated Communications Services SystemC Cisco Smart Business Communications SystemD Cisco Telephony System for Small BusinessE Cisco IP Phone System

单选题Quality of service is analyzed at which service component within the Cisco Unified Communications plan phase()ANetwork Readiness AssessmentBApplication Readiness AssessmentCSite Readiness AssessmentDOperation Readiness Assessment

单选题In areas covered by Inmarsat HF can be used as an()to satellite communications.AalternationBalternateCalterDalternative

单选题What is the fundamental purpose for imposing radio silence? ()ATo ensure that interference to proprietary communications is minimizedBTo ensure that only voice communications can be effected on the distress frequency or channelCTo ensure that a distressed vessel will have a window twice each hour for transmitting routine messagesDTo ensure that interference on a particular frequency or channel to communications concerning emergency traffic is minimized

单选题When can routine communications be resumed when radio silence has been imposed?()AAfter determining that the frequency or channel appears to be no longer in useBAfter determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communicationsCRoutine communications can resume after the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concludedDIf,in the Master's opinion,communications on that frequency will interfere with emergency communications

单选题According to the text, what is beyond man’s ability now is to design a robot that can ______.Afulfill delicate tasks like performing brain surgeryBinteract with human beings verballyChave a little common senseDrespond independently to a changing world