The growth of cell-phone users in the U.S. has
tapered off from the breakneck pace of 50% annually in the late 1990s to what
analysis project will be a 15% to 20% rise in 2002, and no more than that in
2003. To some extent, numerous surveys have found, slower growth in demand
reflects consumer disillusionment with just about every aspect of cell-phone
service--its reliability, quality, and notorious customer service. The cooling off in demand threatens to cascade through the industry: The big four U.S. cell-phone carders--Verizon Wireless, Cingular Wireless, AT&T Wireless, Sprint imperil their timetables for becoming profitable, not to mention their efforts to whittle down their mountains of debt. As the carders have begun to cut costs, wireless- equipment makers--companies such as Lucent, Nokia, and Ericsson--have been left wit A. The bad service in the U.S. cell-phone industry. B. The crisis in the U.S. cell-phone industry. C. The conflicts among cell-phone companies in the U. S. D. The price of the U.S. cell-phone industry. [单项选择]Pedigree method or somatic cell hybridization can be used to map human chromosome genes. When the former is used to do chromosome mapping ______.
A. X chromosome linked genes are easier than somatic genes B. X chromosome linked genes are more difficult than somatic genes C. X chromosome linked genes are as easy as somatic genes D. All the above statements are incorrect because the data of pedigree method is unable to be used in chromosome mapping [填空题]Can you use one phrase to summarize the main idea of the whole passage
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