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回答题: Exercise Being Good or BadCan 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 common 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 isunnecessary. 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.第51题应选：
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戒断综合征的治疗原则_________________________________。
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日常环境布置是幼儿美术活动与美化环境相结合的一种日常美术活动。()
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《女职工劳动保护特别规定》修改的内容主要有哪些？
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本质在于解决各方面的矛盾，使整个组织和谐一致，使每一个部门、单位和组织成员的工作同既定的组织目标一致的是（）。
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国际上关于实现和维持核设施安全的法律规范体系是（）
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迷走神经兴奋时可引起（）
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在商品流通企业筹资管理中，以下属于长期负债筹资的优点的是()。
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变动成本定价法的基本思想是只考虑变动成本，不考虑固定成本，以预期的边际贡献补偿固定成本，并获得盈利。()
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直流电机的感应电势E＝Ceφn，这里φ指（）