black

大学试题答案(课后习题答案)

单项选择题

案例分析题

Americans’use of cell phones has increased so quickly that wireless networks are becoming overloaded，causing a growing number of customers to complain about calls that are inaudible or are cut off or are never connected in some places.
And things could get worse before they get better，industry experts say，because even as cell phone companies are rolling out fancy features like digital photography and Internet-based games，they are not capable of spending the money needed to improve basic service.
’This is a situation in which the wireless industry is a victim of its own success，’said James D.Schlichtinga deputy chief at the Federal Communications Commission.
Many of the industry’s service problems are a result of a huge growth of new customers.The surge in users in overwhelming the capacity to handle calls on wireless systems whether be-cause local transmitters are too few or too small，or because the local airwaves have become too crowded and carriers are unable to obtain larger radio frequencies.
The problems are compounded by basic economics.Customers have been attracted by tile plunge in prices for wireless service.The average per-minute cost has dropped to 11cents this year from 56cents in 1995.For the phone companies that has meant a decline in average revenue per customer to ＄61a month，from ＄74in 1995.And so，just when the wireless companies need to invest more money to accommodate all those new users，the companies are under increased financial strain.As a result，the complaints are piling up.
The percentage of all wireless subscribers who have called customer-service centers at least once in the last year to complain about service or because they had other problems has climbed to 61per cent，from 53per cent in 2000，according to J.D.Power &Associates，a company that measures customer satisfaction in many industries and sells it to the companies.being scrutinized.Another industry problem is the sheer technical complexity of sending and receiving wireless calls.Unlike conventional telephone systems，in which every customer is hardwired to the network，wireless systems rely on a delicate mesh of thousands of antenna towers，which often face resistance from local governments and cellular stations.

According to the passage, the complaints of American customers about the cell phone are showed in the following statements EXCEPT（）.

A．they can not listen to the voice clearly
B．the phone is cut off while they are communicating
C．the prices for wireless service are high
D．the cell phone is never connected in some places

相关考题

单项选择题 请选请选择（47）处的最佳答案．

单项选择题 Forty May Be the New 30 As Scientists Redefine Age Is 40 really the new 30? In many ways people today act younger than their parents did at the same age.Scientists have defined a new age concept and believe it could explain why populations are aging, but at the same time seem to be getting younger.Instead of measuring, aging by how long people have lived, the scientists have factored in how many more years people can probably still look forward to. Using that measure, the average person can get younger in the sense that he or she can have even more years to live as time goes on,' said Warren Sanderson of the University of New York in Stony Brook.He and Sergei Scherbov of the Vienna Institute of Demography (人口统计学)at the Austrian (奥地利的) Academy of Sciences, have used their method to estimate how the proportion of elderly people in Germany, Japan and the United States will change in the future.The average German was 39.9 years old in 2000 and could plan to live for another 39.2 years, according to research reported in the journal Nature on Wednesday. However, by 2050 the average German will be 51.9 years old and will be expected to live another 37.1 years. So middle age in 2050 would occur at around 52 years instead of 40 years as in 2000.'As people have more and more years to live they have to save more and plan more and they effectively are behaving as if they were younger,' said nderson.Five years ago, the average American was 35.3 years old and could plan for 43.5 more years of life. By 2050, the researchers estimate it will increase to 41.7 years and 45.8 future years.'A lot o; our skills, our education, our savings and the way we deal with our health care depend a great deal on how many years we have to live,' said Sanderson.This dimension of how many years people have to live has been completely ignored in the discussion of aging so far. 第 36 题 People 40 years of age today seem to be as young asA． their parents were at the same age.B． their parents were at the age of 30.C． their children will be at the same age.D． their children will be at the age of 30.

单项选择题 What fact indicated that the talk was mostly one-sided?（）

All Rights Reserved 版权所有©在线考试题库网(zxkao.com)

备案号：湘ICP备14005140号-7

经营许可证号：湘B2-20140064