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阅读理解：每篇300～450词，每篇文章后有5道题，要求应试者根据文章的内容，从每题所给的4个选项中选择l个最佳答案。 Powers of Self-suggestion Most systems of medicine are based on theater. With leeches, acupuncture needles, vitamin pills or whatever stage prop is appropriate for the time and culture, the healer artfully evokes the patients powers of self-suggestion, which are responsible for whatever healing may occur. Western medicine operates on a different plane. For one thing, it has the most impressive props - expensive medicines, elaborate rituals and mysterious high-tech machines with a white-gowned cast to operate them. For another, it evokes the patients auto suggestive powers all the more forcefully by pretending to ignore them. This mysterious gift of self-healing is cloaked with an anodyne label, the placebo effect, and recognized only as a nuisance likely to confound clinical trials. But the placebo and its shadowy twin the nocebo are much more than methodological problems: they lie at the heart of every interaction between doctor and patient. How they work no one knows. But the brain rules the body in many subconscious ways, including its control of the bodys major hormones and its subtle influence over the immune system. So its possible that, in ways yet unknown, expectations about health or disease are sometimes translated into a bodily reaction that fulfills them. | 
