【名词&注释】
环境温度(ambient temperature)、企业战略(enterprise strategy)、终端设备(terminal equipment)、正确性(correctness)、端电压(terminal voltage)、数字电话、实际上(actually)、电话卡业务
[判断题]网络的可靠性与经济合理性是对通信网的最基本要求。
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举一反三：
[多选题]IP 电话卡业务按照持卡用户的付费方式和使用方式分类，账号卡有（）。
A. A 类用户
B. B 类用户
C. C 类用户
D. D 类用户
[单选题]第三代无线传输技术提出的支持高速多媒体业务速率要求是( )[1分]
A. 高速移动环境2Mbit/s，室外步行环境384Kbit/s，室内移动环境144Kbit/s
B. 高速移动环境144Kbit/s，室外步行环境384Kbit/s，室内移动环境2Mbit/s
C. 高速移动环境、室外步行环境，室内移动环境均达2Mbit/s
D. 高速移动环境、室外步行环境，室内移动环境均达384Kbit/s
[单选题]密封铅酸蓄电池在环境温度为25度条件下，浮充工作端电压范围()V。
A. 2.15～2.20
B. 2.15～2.25
C. 2.23～2.27
D. 2.25～2.30
[多选题]关于DPCHPO1/PO2/PO3描述正确的是()
A. DPCHPO1是下行DPCH的TFCI域与DPCH数据域的功率偏差，需要区分业务配置
B. DPCHPO2是下行DPCH的TPC域与DPCH数据域的功率偏差
C. DPCHPO3是DPCH的PILOT域的功率偏差
D. 这三个参数是DPCH控制域相对于数据域的功率偏差，为了保证控制域的正确性，对于数据域速率越大，则其功率会越大，则DPCH控制域的偏差就越小
[多选题]IP电话实际上(actually)是一种数字电话，系统由（）组成。
A. 终端设备
B. 网关
C. 多点接入控制单元
D. 网络管理者
[单选题]Deploying enhanced broadband services over existing network infrastructure （ ）in increase of the network complexity and therefore,extra expenses on network management and maintenanc
A. [1分]
B. results
C. resulted
D. resulting
E. result
[多选题]【A popular service that has attercted the interest of companies and has home users alike is the sending of voice signals over an IP-based network, such as the Internet. The practice of making telephone calls over the internet has had a number of different names, including packet voice, voice over packet, voice over the internet, internet telephone, and Voice over Ip（Voip）. But it appears the industry has settled on the term”Voice ove IP” in reference to the internet protocol, which controls the transfer of data over the internet. There are currently three ways to deliver VoIp to users, the first technique is found at the corporate level. Many companies are offering VoIP systerms that operate over a local area network. These systems involve a fair amount of equipment, such as VoIP servers, special IP-enabled telephones, and routers that can direct telephone calls. Today a large portion of corporate sites have converted their older internal telephone systems to VoIP systems that opreate over a LAN, thus converging two systems into one. A second common solution is the one often encountered at home. Using existing telephones, a special converter is added between the telephone and a high speed internet（DSL or cable modem）connection. The converter digitizes the voice signal and creates a stream of packets that are then sent over an ip connection.The third technique involves smart cell phones. Never cell technologies are all packet-based, thus requiring a telephone call to be converted to digital packets and sending those packets over IP networks.】From the paragraph above，a popular service that has attracetd the interest of companies and home users,is termed as （） . The data transfer over the Internet is controlled by the （） . At corporate level, many companies have replaced their older internal telephone systerms with （） that oprerate over a local area network.
A. voice over the internet B、voice over packet
B. Voice over IP
C. internet telephony A、packet B、internet protocol
D. industry
E. VoIp servers A、VoIP systems B、IP-enablde telephones
F. VoIP servers
G. routers
[单选题]企业战略课分为三个层次，其中最高层次的战略是（ ）。
A. 竞争战略
B. 公司战略
C. 职能战略
D. 经营战略
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