
【名词&注释】
功率因数(power factor)、通信机房(communication workshop)、本职工作(appointed task)、可视电话(videophone)、科技活动(science and technology activity)、认真负责(earnestness)、正弦波。、出发点和归宿(starting point and end-result)、谦虚谨慎(modest and prudent)、同心同德
[判断题]功率因数校正电路可是电网输入电流变为与输入电压幅度相同的正弦波。()
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举一反三:
[单选题]由于SPM随长度而积累,因而是采用G.652光纤的单波长系统的基本非线性损伤,门限功率大约为( )dBm。
A. 18
B. 28
C. 38
D. 48
[单选题]灭火器材配备数量,一般部位按()平方米/具配备,重要通信机房、要害部位、仓库等按20平方米/具配备,重要的通信枢纽应配备手推车式灭火器。
A. 10-20,
B. 20-30,
C. 30-40,
D. 40-50
[单选题]下列选项中能够处理和提供声、图、文等多种信息形式的通信终端是( )
A. 可视电话
B. 电视会议系统
C. 数据通信
D. 多媒体计算机
[单选题]科技工作者应有正确的方向和目的,应以()作为科技活动的出发点和归宿(starting point and end-result)。
A. 造福人民,振兴祖国
B. 同心同德,团结协作 C、勤奋求知,严谨治学
C. 谦虚谨慎(modest and prudent),尊重他人
[单选题]【In the forthcoming years,Beyond-3G(B3G) environments will undoubtedly be deployed in most parts around the globe, permitting a world class solution for network interconnection, A B3G context enables the efficient cooperation of existing wireless technologies, including cellular-based(e.g. 2G/3G), broadcast-oriented(e.g. DVB)-in specific DVB-H, and Internet-based(WLAN/WMAN)networks, all relying on enhanced IP as the unifying layer. Hence, in this particular and yet to be deployed environment, mobile, systems and platforms will permit to provide enhanced services to all applications across heterogeneous access networks. This will effectively enlarge the scope of service deployment, availability and accessibility to the users】 Based on the paragraph above, it is shown that (98) will be used as the higher layer protocol to unify cellular networks ,broadcast networks and (99) networks, which is enabled by the context of (100).
A. mobile systems and platforms
B. 3G
C. heterogeneous access networks
D. enhanced IP
[单选题]移动通信使用的厘米波的波长范围是()。
A. 1~0.1m(1~10-1m)
B. 10~1m(1-1~10-2m)
C. 10~0.1mm(10-2~10-3m)
D. 1~0.1mm(10-3~10-4m)
[单选题]社会平均成本是指( )生产同种商品或提供同种服务的平均成本。
A. 不同行业的企业
B. 行业内不同企业
C. 不同行业的不同企业
D. 行业内同一企业消费者他人
[多选题]每个人都要( ) ,培养敬业意识,认真负责地做好自己的本职工作,在平凡的工作中,做出不平凡的贡献,赢得社会的尊重和群众的爱戴。
A. 爱国家
B. 爱人民
C. 爱企业
D. 爱岗位
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