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《有机热载体炉安全技术监察规程》对有机热载体炉在制造单位的水压试验和气密性试验有何规定？
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“古先圣王之所以导其民者先务於农。民农非徒为地利也，贵其志也。民农则朴，朴则易用，易用则边境安，主位尊。"材料体现出：①重视农业生产②关注农民利益③抑制商业发展④力求社会稳定（）
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下面有关计算机的叙述中，正确的是（）
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数控编程FANUC系统中，在用户宏程序中运算的优先顺序是（）。
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下列关于石膏的叙述哪一个有错（）
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什么叫轮对？它有何作用？
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水稻稻叶互生于茎的两侧，可分为（）和叶片两部分，在其交界处有（）、叶耳、（）。
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C-0701为几级压缩？入口控制在多少MPa？
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撰写决定时，从内容到语气，都应当坚决明确。()
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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：