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Recent surveys show that many people who seek media help are under a GREat deal of stress. Medical research also shows that stress can adversely affect an individual’s immune system, which is responsible for combating many infections. Thus when a person is under stress, he or she is more likely to become ill.
Which of the following, if true, would most strength the conclusion above?
解释：此题中Thus表明了因果关系。此题的推理过程为：寻求医疗帮助的人处在巨大的压力之下以及研究表明压力会影响人的免疫系统。所以，如要支持该推理，必须要选择一个与压力和寻求医疗帮助有关的选项。
(A) Many businesses that provide health insurance for their employees also provide seminars on stress management.
(B) Many businesses report a significant decrease in absenteeism during periods when employees feel pressured by management.
(C) There is a marked decrease in the number of complaints (生病) presented at college infirmaries during vacation time. 此选项说明的是“压力小，得病的就少”
(D) There is a marked increase in the number of illness treated at college infirmaries around the time of examinations.此选项说的是“压力大，就会得病”
(E) Most people report that being in a hospital or an infirmary is a stressful situation.
相比较而言，还是D支持的力度最大了
例子8：
A test of the National Weather Service’s storm detecting radar systems found that the 1957 system is ten times more reliable than the new computerized system. Therefore the technology used in the new radar system must be less sophisticated than the radar technology used in the 1957 system.
The conclusion drawn above depends on which of the following questionable assumptions?
解释：此题中Therefore表明了因果关系。此题的推理过程为：因为1957年的系统比新的计算机化了系统精确10倍。所以，新的系统的技术没有1957年系统的系统复杂。本题假定 系统技术的复杂程度决定着系统的可靠性。
(A) The reliability of storm-detecting radar systems is determined by the frequency of breakdowns.
(B) The level of sophistication of the technology used in storm-detecting radar system can be determined from the
reliability of the system.
(C) The reliability of storm-detecting radar systems is determined by their accuracy in predicting weather patterns.
(D) Computer hardware is now a key component of the new storm-detecting radar systems used by weather forecasting services.
(E) Most of the significant advances in storm detecting technology were made in the 1950s
其它几个选项都出现了与本题不相关的内容。