（一）ExerciseBeingGoodorBad回答下列问题:Canexercisebeabadthing?Suddendeathduringors

共享题干题                                       （一）Exercise Being Good or Bad 回答下列问题:Can exercise be a bad thing? Sudden death during or soon after strenuous exertion on the squash court or on the army training grounds, is not unheard of. __________（51） trained marathon runners are not immune to fatal heart attacks. But no one knows just __________（52）mon these sudden deaths linked to exercise are.     The registration andinvestigation of such __________（53） is very patchy; only a national survey could determine the true __________（54）of sudden deaths in sports. But the climate of medical opinion is shifting in __________（55）of exercise, for the person recovering from a heart attack as__________（56） as the average lazy individual. Training can help the victim of a heart attack bylowering the __________（57 ）of oxygen the heart needs at any given level of work__________（58） the patient can do more before reaching the point where chest pains indicate a heart starved of oxygen. The question is, should middle-aged people, __________（59） .particular, be screened for signs of heart disease before __________（60） vigorous exercise?    Most cases of sudden death in sport are caused by lethal arrhythmias in the beating of the heart, often in people __________（61） undiagnosed coronary heart disease. In North America __________（62）over 35 is advised to have a physical check-up and even an exercise electrocardiogram. The British, on the whole, think all this testing iunnecessary. Not many people die from exercise, __________（63） , and ECGs ( 心电图 ) are notoriously inaccurate. However, two medical cardiologists at the Victoria Infirmary in Glasgow, advocate screening by exercise ECG for people over 40, or younger people __________（64） at risk of developing coronary heart disease. Individuals showing a particular abnormality in their ECGs __________（65）, they say, a 10 to 20 times greater risk of subsequently developing signs of coronary heart disease, or of sudden death.1.[不定向选择题]__________A.however B.because C.but D.so 2.[不定向选择题]__________A.why B.how C.if D.what