英语四级
单选题There arein the following passage. For each blank there are four choices marked A）, B）, C） and D） on the right side of the paper. You should choose the ONE that best fits into the passage. Then mark the corresponding letter on the Answer Sheet with a single line through the centre.
As a physician who travels quite a lot, I spend a lot of time on planes listening for that dreaded “Is there a doctor on board?” announcement. I’ve been __71__ only once—for a woman who had merely fainted. But the __72__ made me quite curious about how __73__ this kind of thing happens I wondered what I would do if __74__ with a real midair medical emergency-with out access __75__ a hospital staff and the usual emergency equipment. So __76__ the New England Journal of Medicine last week __77__ a study about in –flight medical events. I read it __78__ interest.
The study estimated that there are a（n） __79__ of 30 in-flight medical emergencies on U.S. flights every day. Most of them are not __80__; fainting and dizziness are the most frequent complaints. __81__ 13% of them –roughly four a day—are serious enough to __82__ a pilot to change course. The most common of the serious emergencies __83__ heart trouble, strokes, and difficulty breathing.
Let’s face it: plane rides are __84__. For starters, cabin pressures at high altitudes are set at roughly __85__ they would be if you lived at 5,000 to 8,000 feet above sea level. Most people can tolerate these pressures pretty __86__, but passengers with heart disease __87__ experience chest pains as result of the reduced amount of oxygen flowing through their&nb
As a physician who travels quite a lot, I spend a lot of time on planes listening for that dreaded “Is there a doctor on board?” announcement. I’ve been __71__ only once—for a woman who had merely fainted. But the __72__ made me quite curious about how __73__ this kind of thing happens I wondered what I would do if __74__ with a real midair medical emergency-with out access __75__ a hospital staff and the usual emergency equipment. So __76__ the New England Journal of Medicine last week __77__ a study about in –flight medical events. I read it __78__ interest.
The study estimated that there are a（n） __79__ of 30 in-flight medical emergencies on U.S. flights every day. Most of them are not __80__; fainting and dizziness are the most frequent complaints. __81__ 13% of them –roughly four a day—are serious enough to __82__ a pilot to change course. The most common of the serious emergencies __83__ heart trouble, strokes, and difficulty breathing.
Let’s face it: plane rides are __84__. For starters, cabin pressures at high altitudes are set at roughly __85__ they would be if you lived at 5,000 to 8,000 feet above sea level. Most people can tolerate these pressures pretty __86__, but passengers with heart disease __87__ experience chest pains as result of the reduced amount of oxygen flowing through their&nb
参考答案：A进入在线模考
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