Continuous indoor fluorescent light benefits the health of hamsters with inherited heart disease. A group of them exposed to continuous fluorescent light survived twenty-five percent longer than a similar group exposed instead to equal periods of indoor fluorescent light and of darkness. The method of the research described above is most likely to be applicable in addressing which of the following questions?
A. Can industrial workers who need to see their work do so better by sunlight or by fluorescent light? B. Can hospital lighting improved to promote the recovery of patients? C. How do deep-sea fish survive in total darkness? D. What are the inherited illnesses to which hamsters are subjects? E. Are there plants that require specific periods of darkness in order to bloom?
The method described in the question stem contains two important parts: 1. using a control group, 2. varying the length of time exposed to the same light to achieve an improvement in the quality of life. A talks about different types of light, not different lengths of light. B, on the other hand, would likely involve at three components: 1. a control group, 2. varying the length of exposure to light, and 3. the type of light. And all these things related to an improvement in the quality of life of the patients.
XDF的解释是因为题目讲HEALTH,B也是讲HEALTH,更接近。由此可见一斑....... |