标题: 求讨论~！ [打印本页] 作者: 叆叇118 时间: 2011-9-5 14:37 标题: 求讨论~！ Because visual inspection cannot reliablydistinguish certain skin discolorations from skin cancers, dermatologists atclinics have needed to perform tests of skin tissue taken from patients. At Westville Hospital , dermatologicaldiagnostic costs were reduced by the purchase of a new imaging machine thatdiagnoses skin cancer in such cases as reliably as the tissue tests do. Consequently, even though the machine isexpensive, a dermatological clinic in Westville is considering buying one toreduce diagnostic costs. Which of the following would it be mostuseful for the clinic to establish in order to make its decision?
Whether the visits of patients who require diagnosis of skin discolorations tend to be shorter in duration at the clinic than at the hospital
Whether the principles on which the machine operates have been known to science for a long time
Whether the machine at the clinic would get significantly less heavy use than the machine at the hospital does
Whether in certain cases of skin discoloration, visual inspection is sufficient to make a diagnosis of skin cancer
Whether hospitals in other parts of the country have purchased such imaging machines