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Researchers found that people who sleep approximately 7-8 hours per night have a lower risk of heart disease compared to those who sleep less or more than this range. Consequently, it is suggested that controlling sleep duration to fit within this range can reduce the risk of heart disease. Which of the following, if true, most strongly weakens this conclusion?
(A) Individuals who sleep more than 8 hours are often recovering from illness or injury.加强
(B) Sleep duration is influenced by a variety of factors, including stress, diet, and physical activity.虽有其他因素,但是7-8小时还是有可能相对其他时长健康。
(C) People with heart disease tend to sleep more due to the body's increased need for rest and recovery.那不是说明更需要多睡来利好心脏,削弱
(D) The study did not account for the quality of sleep, which can vary greatly among individuals.无关
(E) Some individuals have genetic predispositions遗传倾向 that affect both their sleep patterns and heart disease risk.这可能表明两者之间的关系不仅仅是因果关系,
"A city is planning to replace an old coal mine with either a modern coal facility or a high-tech industry. The high-tech industry, however, would require hiring new personnel with specialized skills, potentially leading to unemployment among the current mine workers. The city ultimately decides to opt for the modern coal facility, believing it to be the better choice in terms of employment."
Which of the following, if true, most strengthens the decision to opt for the modern coal facility?
A)The city's unemployment rate has been steadily increasing over the years.无关
B)The current mine workers are willing to undergo training for high-tech jobs.工人乐意就代表他们都能留下吗?不一定
C) The modern coal facility will employ a stable workforce due to less reliance on high-tech.正确,现代煤炭设施可以提供稳定的就业,减少对高科技的依赖,这对于保持矿工就业是有益的
D) Operating the modern coal facility will primarily require computer skills, not physical labor.削弱
E) High-tech industries generally have lower employee turnover rates compared to traditional industries.与行业无关 |
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