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冲刺2008高考英语模拟试题 (五) 下 (含答案)

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C     An experimental treatment that causes AIDS patients to develop a dangerously high fever has shown promise as a way of prolonging and improving the patients’ life．     Called the BioLogic-HT System, the new treatment lets doctors extract(抽出) the blood of a patient and heat it before circulating it back into the body．The heated blood causes the patient’s body temperature to rise above 42 degrees Celsius．In people with AIDS, that increase in temperature kills some heat-sensitive HIV, the virus (病毒) that most doctors say causes AIDS． Heating the blood of AIDS patients has been tried before, say doctors．But during previous attempts, the treatment caused deadly chemical changes in the blood．Tile BioLogic - HT System prevents those changes from happening, allowing the heat to kill viruses with few ill side effects．     The new heat treatment cannot be considered a cure for AIDS, says president of the company that makes the system．He says the treatment doesn't kill all the viruses．However, it kills enough virus particles (微粒) to give a patient's immune system reprieve (暂减) in its deadly duel (斗争) with HIV．     Tests of BioLogic - HT treatment began on 36 patients earlier this year．The treatment takes about four hours, and the patient normally feels well enough to leave the hospital or clinic the following morning．

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