阅读理解 Cut out part of a healthy person's liver and transplant it into a sick

题文

阅读理解 Cut out part of a healthy person's liver and transplant it into a sick person--it sounds like a complicated and dangerous operation , not to mention very expensive. But it is sometimes the only possible cure for a riously ill patient with liver dia. Until now British scientists have just announced a new stem cell technique, which allows them to grow healthy liver cells outside human bodies. According to the rearchers, it could be another five to 10 years before the technique can actually be ud to help patients with liver dia. However, they say the method might one day replace liver transplants altogether. The study was led by the University of Cambridge and the Welcome Trust Sanger Institute, a British genomics and genetics rearch institute. It was published in the journal nature on October 12,2011. The rearchers took skin cells from a patient with a mutation (变异) in a gene called alphal-antitrypsin (a-l抗胰蛋白酶). This gene makes a protein that protects our bodies against inflammation (炎症). People with changed or damaged alphal-antitrypsin are not able to relea the protein correctly from the liver, so the protein is trapped there and eventually leads to liver cirrhosis (肝硬化). Scientists then ud an advanced technique to cut away the faulty ction of DNA from a stem cell and replace it with a corrected one, according to the journal. The stem cells went on to produce fresh and healthy liver cells with normal protein levels. Scientists put the new liver cells into mice and found that they worked very well. Stem cells are the life source of all other cells in the body. They could transform medicine, providing treatment for blindness, spinal cord injuries and other rous injuries. They could also be ud to produce new cells for damaged organs. David Lomas, a Cambridge biology professor who worked on the team, said: "If we can u a patient's own skins cells to produce liver cells that we can put back into the patient, we may prevent the future need for transplantation. " 1. what is the best title of this passage? A. How to transplant liver for patientsB. A new way to transplant livers for patients  C. The difficulty in curing liver patientsD. New life for liver patients 2. The first paragraph is written to _______. A. show how difficult it is to cure liver dia  B. tell us what a liver transplant involvesC. introduce a potential cure for liver diaD. show how rious liver dia can be 3.Why do some people get liver cirrhosis according to the article? A. Becau their bodies are lacking in alphal-antitrypsin.B. Becau their skin cells are not able to protect against inflammation.C. Becau the alphal-antitrypsin in their bodies is changed or damaged.D. Becau their liver releas too high a level of protein. 4. According to British scientists, liver transplant might ___________. A. become history sooner or laterB. be replaced by a new stem cell technique in five yearsC. be the only possible cure liver dia in the futureD. be prevented in the future 5. What can be inferred from the passage? A. Stem cells can keep liver cells healthy and fresh.B. Equaling medicine, stem cells can cure blindness, spinal cord injuries and other rous injuriesC. Stem cells can replace the damaged organs.D. All other cells in the body can't work well without stem cells 题型：未知难度：其他题型

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1-5: DCCAD

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据考高分专家说，试题“阅读理解 Cut out pa.....”主要考查你对 [健康环保类阅读 ]考点的理解。 健康环保类阅读

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健康环保类文章常是介绍科学知识、生活常识和环境保护方面的短文。体裁有记叙文、 说明文、议论文和各种应用文。

健康环保类文章阅读技巧：

   健康环保类文章常是介绍科学知识、生活常识和环境保护方面的短文。阅读此类短文要以现象或事物为中心进行思考，理解现象产生的原因、条件和客观规律等。同时要抓住事物的特征、用途和相互关系等。科普环保类文章一般为说明文，从结构上看大致可分为三个部分：   第一部分一般是文章的首段，主要用来提出文章的主题，即文章想要阐述、说明的主要内容；   第二部分是文章的主体，可由若干个段落组成，对文章的主题进行展开说明；   第三部分是结尾段，对文章的主题进行归纳总结。这类文章多用一般现在时，而且一般多使用客观性词语表述。有时为了强调客观性，也常使用被动语态。   从近几年的考试题来看，科普环保类的文章越来越与人们的实际生活相接近。由于此类文章缺乏故事情节，很多同学对此类文章感到费解。但一般的科普类文章都是就事论事，需要逻辑推理和想象的时候较少，因此此类阅读题也没有同学们想象中的那么难，只要多加训练，就能较好地答题。【阅读策略】 1、概要(Summarizing)：  阅完材料后，将所阅材料浓缩，摘要，做出所阅材料的书面或口头梗概。 2、组织(Organization)：  阅读后根据阅读内容，识别观点、人物、事件之间的关系以及文章的结构关系。如：时间关系、比较或对比关系、相关关系及因果关系等。