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题目：
单选题
A铅矿开采
B汽车尾气排放
C钢铁冶炼厂排放
D印刷厂排放
E以上都不是
答案：
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人民代表大会制度是我国的根本政治制度，我国人民代表大会制度组织和活动的基本原则是（）。
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下列哪项不属于凿岩爆破落矿?()
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简述下对新艺术的评价。
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聚丙烯的缩写代号是（）。
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恩氏蒸馏的10%、30%、50%、70%、90%五个馏出温度的平均值称为油品的（）。
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麦芽的干法粉碎一般都采用辊式粉碎机，通过调节对辊之间的间距来调节麦芽的（）。
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托盘下管
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荷马史诗
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高度恶性的胃癌可超越常规所属区域淋巴结的转移直接侵犯远处淋巴结，并提示手术已无法根治。这种远处淋巴结一般指()
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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：