2011年职称英语卫生类B考前每日一练(11)

文章作者 100test 发表时间 2011:03:12 11:44:59
来源 100Test.Com百考试题网

下面的短文后有2项测试任务：(1)第23～26题要求从所给的6个选项中为第2～7段名其中4段选择1个最佳标题；(2)第27～30题要求从所给的6个选项中为每个句子确定1个最佳选项。

　　第3部分：概括大意与完成句子(第23～30题，每题1分，共8分)
　　下面的短文后有2项测试任务：(1)第23～26题要求从所给的6个选项中为第2～7段名其中4段选择1个最佳标题；(2)第27～30题要求从所给的6个选项中为每个句子确定1个最佳选项。
　　Screen Test
　　1. Every year millions of women are screened with X-rays to pick up signs of breast cancer. If this happens early enough, the disease can often be.treated successfully. According to a survey published last year,21 countries have screening programmes. Nine of them, including Australia, Canada, the US and Spain, screen women under 50.来源：www.100test.com
　　2. But the medical benefits of screening these younger women are controversial, partly because the radiation brings a small risk of inducing cancer. Also, younger women must be given higher doses of X-rays because their breast tissue is denser.
　　3. Researchers at the Polytechnic University of Valencia analysed the effect of screening more than 160,000 women at 11 local clinics. After estimating the womens cumulative dose of radiation, they used two models to calculate the number of extra cancers this would cause.
　　4. The mathematical model recommended by Britains National Radiological Protection Board (NRPB) predicted that the screening programme would cause 36 cancers per 100,000 women, 18 of them fatal. The model preferred by the UN Scientific Committee on the Effects of Atomic Radiation led to a lower figure of 20 cancers.
　　5. The researchers argue that the level of radiation-induced cancers is "not very significant" compared to the far larger number of cancers that are discovered and treated. The Valencia programme, they say, detects between 30Orand 450 cases of breast cancer in every 100,000 women screened.
　　6. But they point out that the risk of women contracting cancer from radiation could be reduced by between 40 and 80 percent if screening began at 50 instead of 45, because they would be exposed to less radiation. The results of their study, they suggest, could help "optimise the technique" for breast cancer screening.
　　7."There is a trade-off between the diagnostic benefits of breast screening and its risks, " admits Michael Clark of the NRPB. But he warns that the study should be interpreted with caution. "On the basis of the current data, for every 10 cancers successfully detected and prevented there is a risk of causing one later in life. Thats why radiation exposure should be minimized in any screening programme. "
　　23. Paragraph 2__________
　　24. Paragraph 3__________
　　25. Paragraph 4__________
　　26. Paragraph 7__________
　　
　　27. If discovered early, breast cancer may__________
　　28. Medical benefits of screening the younger women are__________
　　29. Advantages of screening women under 50 are__________
　　30. Radiation exposure should be
　　

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