题目内容
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IEEE802.11定义了无线局域网的两种工作模式，其中的(208)模式是一种点对点连接的网络，不需要无线接入点和有线网络的支持，它通过把一组需要互相通讯的无线网卡的ESSID设为同值来组网。IEEE802.11的物理层规定了三种传输技术，即红外技术、直接序列扩频(DSSS)和跳频扩频(FHSS)技术，后两种扩频技术都工作在(209)的ISM频段。IEEE802.11 MAC层具有多种功能，其中分布式协调功能采用的协议是(210)，用于支持突发式通信，而(211)功能用于支持多媒体应用。最新提出的IEEEE802.11a标准可提供的最高数据速率为(212)。
A．Roaming
B．AdHoc
C．Infrastructure
D．DiffuselR
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更多“IEEE802.11定义了无线局域网的两种工作模式，其中的（…”相关的问题
第1题
Range estimating in determining cost risk probabilities requires _____ .
A an amount of financial exposure.
B risks and opportunities ranked in order of bottom line importance
C contingency requirements for expected level of confidence
D probability of cost overrun occurrences
E All of the above.
第2题
137 Range estimating in determining cost risk probabilities requires _____ .
A. an amount of financial exposure.
B. risks and opportunities ranked in order of bottom line importance
C. contingency requirements for expected level of confidence
D. probability of cost overrun occurrences
E. All of the above
第3题
84 In which of the following cost estimating techniques are statistics models used:
A. nonparametric cost estimating
B. parametric cost estimating
C. life cycle cost estimating
D. bottom-up estimating
E. All of the above.
第4题
In which of the following cost estimating techniques are statistics models used:
A . nonparametric cost estimating
B . parametric cost estimating
C . life cycle cost estimating
D . bottom-up estimating
E . All of the above.
第5题
166 In which of the following cost estimating techniques are statistics models used:
A. nonparametric cost estimating
B. parametric cost estimating
C. life cycle cost estimating
D. bottom-up estimating
E. All of the above
第6题
Cost management includes:
A . Cost estimating/forecasting.
B . Cost budgeting/cost control.
C . Cost applications.
D . All of the above.
E . A and B only.
第7题
180 Cost management includes:
A. Cost estimating/forecasting.
B. Cost budgeting/cost control.
C. Cost applications.
D. All of the above.
E. A and B only
第8题
98 Cost management includes:
A. Cost estimating/forecasting.
B. Cost budgeting/cost control.
C. Cost applications.
D. All of the above.
E. A and B only
第9题
Estimating schedule activity costs involves developing an (1) of the cost of theresources needed to complete each schedule activity. Cost estimating includes identifying and considering various costing alternatives. for example, in most application areas, additionalwork during a design phase is widely held to have the potential for reducing the cost of the execution phase and product operations. the cost estimating process considers whether the expected savings can offset the cost of the additional design work. cost estimates are generally expressed in units of (2) to facilitate comparisons both within and across projects.the (3) describes important information about project requirement that is considered during cost estimating.
空白（1）处填（）
A. accuracy
B. approximation
C. specification
D. summary
第10题
Estimating schedule activity costs involves developing an(4)of the cost of the resources needed to complete each schedule activity. Cost estimating includes identifying and considering various costing alternatives. For example, in mostapplication areas, additional work during a design phase is widely held to have the potential for reducing the cost of the execution phase and product operations. The cost estimating process considers whether the expected savings can offset the cost of the additional design work. Cost estmates are generally expressed in units of(5)to facilitate comparisions both within and across projects. The(6)describes important information about project requirement that is considered during cost estimating.
A．accuracy
B．approxination
C．specification
D．summary
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