根据实践经验确定选择特定对象进行研究，关系到研究结论是否有价值。()
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客户在股指期货交易中发生保证金不足，而又未能按照期货公司要求及时追加相应保证金或者主动减仓时，期货公司可以强行平掉该客户部分或者全部持仓。()
Despite improvements in treatment for asthma, the death rate from this disease has doubled
A. Urban populations have doubled in the past decade.
B. Records of asthma deaths are as accurate for the past twenty years as for the past ten years.
C. Evidence suggests that bronchial inhalers make the lungs more sensitive to irritation by airborne pollen.
D. By tem|X)rarily relieving the symptoms of asthma, inhalers encourage sufferers to avoid more beneficial measures.
E. Ten years ago bronchial inhalers were not available as an asthma treatment.
United States advertising agencies are increasingly using interviews at shopping malls, called "mall intercepts", to test for advertising effectiveness, product concept viability, and consumer buying habits. Critics of mall intercepts maintain that the shopping habits of mall shoppers are not representative of those of the larger population. Which of the following, if true, would provide evidence that most supports the critics claim about mall intercepts？
A. Some mall shoppers patronize more than one store in any given shopping trip.
B. Mall shoppers, on average, spend 50 percent more time shopping than shoppers at other locations do.
C. In the course of any year, 95 percent of all households in the United States have at least one member who does some shopping at a mall.
D. Mall shoppers who use public transportation to reach the mall tend to have lower incomes than mall shoppers who drive to the mall.
E. Indoor malls often attract the customary numbers of shoppers even during inclement weather when outdoor malls are likely to lose business.
默认情况下，Windows2000有3个日志文件：应用程序日志文件、安全日志文件以及()。
A. 目录服务日志文件
B. DNS服务器日志文件
C. 系统日志文件
D. 文件复制服务日志文件
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