题目

阅读理解 It takes just four minutes for brain cells to be permanently damaged due to a severe lack of oxygen in cases of sudden cardiac arrest (心搏停止). If medical workers do not arrive at the scene of such emergencies within 10 minutes, the chances of a victim surviving are minimal. In September, a 45-year-old man fell unconscious at Huoying station on Line 13 of the Beijing Subway. He died later in the hospital, despite attempts by two passengers to revive him by using cardiopulmonary resuscitation, or CPR. However, if an automated external defibrillator, or AED, had been a vailable at the scene, the man's chances of survival would have been greatly improved. An AED can recognize an abnormal lheart rhythm and quickly correct it through an electric shock. The devices are viewed in medical circles as a more efficient and effective method of saving lives in emergencies than using CPR. After a brief training period, people with no medical knowledge can master the basic skills needed to use an AED. In May last year, a student at Tsinghua University in Beijing fainted in a dormitory after experiencing head sweats. Several students began to perform CPR and also used a newly installed AED to help the stricken freshman. After two electric shocks were administered, the student's heart beat was restored and he was sent to the hospital for further treatment. An emergency doctor from the hospital who attended the scene said it was highly likely the student would have died, had not a series of the correct first aid measures been applied, along with the AED.   PeiZheng, a staff member from Tsinghua University's Policy Research Office, said it was "really cool" that AEDs were available at the institution. "It's so good that we have these life-saving machines on campus, otherwise we would have heard tragic news," she said. The devices have been installed around the campus in stages. （1） What can we infer about AED? A . It is quite easy to learn. B . It is available nationwide. C . It has saved many lives. D . It is invented by medical workers. （2） A 45-year-old man and a student are mentioned in the text to ________. A . make comparisons in age B . stress the function of CPR C . show the efficiency of AED D . raise the awareness of heart attack （3） Why have AEDs been installed around the campus of Tsinghua University? A . To safeguard students' health. B . To make the campus more beautiful. C . To apply knowledge to practice. D . To make it convenient to learn AE （4） What is the main idea of the text? A . Heart attack can be prevented. B . First aid should be learned widely. C . Universities are equipped with new devices. D . Life-saving devices come to the rescue. 答案： A C A D

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