第三题概括段意与完成句子第十三篇Screen Test

第十三篇Screen Test 透视检查1. Every year millions of women are screened with X-rays to pick up signs of breast cancer.每年上百万的女性都做X射线透视，检查是否有乳腺癌迹象。

If this happens early enough, the disease can often be treated successfully. 如果检查得足够早，疾病就可以被成功地治疗。

According to a survey （调查）published last year, 21 countries have screening programmes.根据去年公布的一项调查，21个国家有透视计划。

Nine of them, including Australia, Canada, the US and Spain, screen women under 50.其中9个国家，包括澳大利亚、加拿大、美国和西班牙为50岁以下女性进行透视。

2. But the medical benefits of screening these younger women are controversial（有争议的）, partly because the radiation（辐射） brings a small risk of inducing cancer. 但是，用X射线检查年轻女性，就医学上的好处而论，是有争议的，部分原因是辐射有诱发癌症的小小的危险。

Also, younger women must be given higher doses of X-rays because their breast tissue （组织） is denser.另外，年轻女人乳房组织紧密，给予的X射线的剂量要多一些。

3. Researchers at the Polytechnic University1 of Valencia analysed the effect of screening more than 160,000 women at 11 local clinics. 理工大学的研究人员分析了11个社区诊所用X射线检查16万以上女性的结果。

After estimating the women’s cumulative dose of radiation, they used two models to calculate the number of extra cancers this would cause. Valencia估测了女性的辐射累积剂量之后，他们用两种模型计算由此导致额外癌症数量。

4. The mathematical model recommended by Britain’s 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.英国国家辐射保护委员会推荐的数学模型预言，透视计划会导致每10万个女性中有36人患上癌症，18人致死。

联合国原子辐射影响科学委员会首选的模型得出了一个较低的数字-20人患上癌症。

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. 研究人员争辩说，与发现后接受治疗的癌症数字相比，由辐射诱发癌症的数字是很小的。

The Valencia programme, they say, detects between 300 and 450 cases of breast cancer in every 100,000 women screened.他们说，Valencia计划在每10万接受透视的妇女中发现300到450个乳腺癌病例。

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. 但是他们指出如果X射线检查从50岁而不是45岁时开始，会使妇女由于辐射而患癌的危险减少40%到80%，因为她们可以接受更少的辐射。

The results of their study, they suggest, could help “optimize the techni que” for breast cancer screening.他们暗示说，他们研究的结果有助于使乳腺癌透视的技术更加完善。

7. “There is a trade-off（平衡） between the diagnostic（诊断的，判断的）benefits of breast screening and its risks,” admits Michael Clark of the NRPB. 英国国家辐射保护委员会的Michael Clark承认“在胸透的诊断益处和危险之间有一个平衡”。

But he warns that the study should be interpreted with caution. 但是他警告说应该谨慎地解释此项研究。

“On the basis of the current （目前的）data, for every 10 cancers successfully detected and prevented there is a risk of causing one later in life. “基于目前的数据，每成功地发现10例癌症就有可能导致今后出现一例癌症。

That’s why radiation exposure should be minimized in any screening programme.”这就是为什么在所有的透视计划中，辐射应该减少到最小的原因。

”练习：1. Paragraph2 ___A_____：1．A A说的是：用X射线检查可能对年轻女人不好。

下面是第二段讲的意思：但是，用X射线检查年轻女性，就医学上的好处而论，是有争议的，部分原因是辐射有诱发癌症的小小的危险。

另外，年轻女人乳房组织紧密，给予的X射线的剂量要多一些。

2. Paragraph3 ___B_____2．B B说的是：调查用X射线检查的结果。

第三段的第一句话是这么说的：Valencia理工大学的研究人员分析了11个社区诊所用X射线检查16万以上女性的结果。

可见B为正确的选项。

3. Paragraph4 _ _C___3．C C说的是：两种不同的模型预测的结果。

第四段讲的是，两种不同的数学模型在预测用X射线检查女性诱发癌症的结果是不一样的。

C概述了这段话。

4. Paragraph5 ___D__4．D D说的是：辐射诱发癌症的危险是很小的。

第五段的第一句话是这么说的：Theresearchers argue that the level of radiation-induced cancers is“not very significant”comparedto the far larger number of cancers that are discovered and treated.研究人员争辩说，与发现后接受治疗的癌症数字相比，由辐射诱发癌症的数字是很小的。

A. Harm Screening May Do to a Younger WomanB. Investigating （调查）the Effect of ScreeningC. Effects Predicted by Two Different ModelsD. Small Risk of Inducing Cancers from RadiationE. Treatment of CancersF. Factors That Trigger Cancers5.Early discovery of breast cancer may____C____. 5．C C与题干生成：Early discovery of breast cancer may save a life.乳腺癌发现得早也许能挽救生命。

答案可以从第一段中找到。

6.Advantages of screening women under 50 are __D_____. 6．D D与题干生成：Advantages of screening women under 50 are still open to debate.对50岁以下的女人用X射线检查的好处仍然是有争议的。

第二段的第一个句子是这么说的：Butthe medical benefits of screening these younger women are controversial…但是，用X射线检查年轻女性，就医学上的好处而论，是有争议的……这两个句子用词有些差别，但基本意思是相同的。

7.Delaying the age at which screening starts may ___E_____. 7．E E与题干生成：Delaying the age at which screening starts may reduce the risk of radiationtriggering a cancer.延缓用X射线检查的年龄也许能减少辐射诱发癌症的危险。

答案在第六段。

8.Radiation exposure should be ___F_____.8．F F与题干生成：Radiation exposure should be reduced to the minimum.应把接受辐射降低到最小的程度。