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题库 / Prep2012-CR-20
Public health official: Some researchers suspect that magnetic fields from high-voltage power lines can cause health problems for people who live especially near the lines. However, this is extremely unlikely: Beyond a distance of a few feet, the strength of the magnetic fields from high-voltage power lines is less than the average strength of magnetic fields in homes that are not located near such lines.
Which of the following would it be most useful to establish in order to evaluate the public health argument?
Whether magnetic fields in homes that are not located near high-voltage power lines can cause health problems for the residents of those homes
What proportion of people who live near high-voltage power fines believe that those fines may cause health problems
Whether high-voltage power lines are routed near residential in urban areas
What specific diseases or conditions are suspected by some researchers to result from exposure to magnetic fields from high-voltage power lines
What is the average strength of magnetic fields in workplaces that are not located near high-voltage power lines
fines 应该lines。 看到一头雾水的，后来才发现应该lines。另外本题是评估，不是加强。A项问的是房间内的磁场强度是否对人有伤害，如果没有伤害，那么肯定没问题。如果有伤害，需要进一步评估。所以很完美啊！
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