根据下列选项，回答 122～125 题：阅读以下文字，回答问题。 跟电视一样，收视率对中国电视和广告行业而言，是个地地道道的舶来品，在中国的使用不过短短的二十余年。由于这是一个全新的行业指标，因此不仅国内开展此类业务的经验还有待摸索和积累，而且对这一领域进行深入研究的专家和机构也少之又少。如此一来，在...
After a study of 800 persons with high blood pressure, they found that after 6 months those devoted to weight loss--exercise and eating a low-salt, low-fat food--lost about 13 pounds and became fitter. Plus, 35% of them dropped into the "normal" category (范畴). This week, D...