试题与答案

平均数、率表示( ) A.集中趋势指标 B.离散趋势指标 C.抽样误差指标 D.假

题型:单项选择题

题目:

平均数、率表示( )

A.集中趋势指标
B.离散趋势指标
C.抽样误差指标
D.假设检验指标
E.样本计量指标

答案:

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参考答案:A解析:奢侈品的需求弹性系数大于1,生活必需品的需求弹性属于缺乏弹性

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题型:单项选择题

An internet is a combination of networks connected by (1).When a datagram goes from a source to a(2),it will probably pass many (3)until it reaches the router attached to the destination network. A router receives a (4)from a network and passes it to another network. A router is usually attached to several networks. When it receives a packet, to which network should it pass the packet? The decision is based on optimization: Which of the available (5)is the optimum pathway?

空白(5)处应选择()

A.pathways

B.routers

C.diagrams

D.calls

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