题目

Hemophilia(血友病)results when a gene fails to produce the protein(蛋白质) needed for the blood to clot(凝结), or change from a liquid to a solid. The fault gene is passed from parents to children. People with hemophilia suffer uncontrollable bleeding. This can result in pain, tissue swelling(肿胀)and permanent damage to joints and muscles.      One in every ten thousand males has the most common kind of hemophilia. It’s extremely rare for females to have it. Patients can be treated with the missing clotting substance. They generally can lead normal lives.       Scientists say gene treatment may be a possible way to cure hemophilia in the future. Researchers consider hemophilia the best disease for gene treatment because it is caused by a single fault gene. Also, only a small increase in the missing clotting substance could provide good results. They tested gene treatment in six patients with severe hemophilia.       First, they removed skin ceils from the patients’ arms. The researchers grew the cells in the laboratory. They added copies of the needed gene taken from healthy people. Then they created hundreds of millions of genetically  changed cells. They placed these cells into the patients’ stomachs. After four months, the amount of blood clotting substance in the blood increased in four of the six patients．Some of the patients reported a decrease in bleeding problems. However, ten months later, the clotting substance was no longer in the patients’ blood. It is not clear if the implanted cells died or the added genes stopped working. The researchers say the study showed that gene treatment is safe for people with the most common kind of hemophilia. But others expressed concern about the treatment because the effects were only temporary. 32. Which of the following statements is NOT true about hemophilia? A. It is caused by a fault gene and is passed from parents. B. It suffers uncontrolled bleeding. C. People with hemophilia don't have any physical damage and can lead normal lives. D. It doesn’t succeed in making protein needed for blood to form into clots. 33. People with hemophilia can live normally when 　　　　　　. A. they are treated with the missing clotting substance B. they accept the scientists’ help C. good copies of gene are placed in their bodies D. they place some genetically changed cells into their stomachs 34. By carrying out the experiment, scientists conclude that    . A. the effects of treatments are excellent and last long B. gene treatment is a safe and possible way to treat hemophilia C. people with hemophilia can recover completely with gene treatment    D. hemophilia is a disease that can be treated easily 35. The passage is mainly about______. A. Whether people with hemophilia can live normally. B. how to control the bleeding for hemophilia patients. C. how the researchers remove skin cells from patients.     D. The gene treatment for hemophilia. 答案： CABD

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