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支出功能分类反映政府支出的内容和方向，事业单位应分类设置科目的级别数是（）。
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已知某机架的出口速度为812m/min，轧辊的圆周速度为800m/min，求前滑值是多少？
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正常人体每天需要碘约多少（）
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直流电机在运行时，电刷下产生火花，是属于换向不良的表现。（）
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监测女性的排卵功能，以下哪项检查是不必要的（）
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女性乳腺受内分泌影响，从发育至老年分期，不包括下列哪项？（）
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老年男性，65岁，既往有胆囊结石病史，因上腹痛4小时由家属送诊，查体：意识淡漠，血压90/50mmHg，右上腹部肌紧张。可能采取的手术方式为（）。
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单因素方差分析的备择假设应该是（）
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为什么采掘工程在接近封闭不良钻孔时要超前探放水？
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根据材料，完成题。 Fitness Movement The fitness movement that began in the late 1960s and early 1970s centered around aerobic exercise.Millions of individuals became engaged in a variety of aerobic activities, and51thousands of health spas developed around the country to capitalize on his52interest in fitness, particularly aerobic dancing for females. A number of fitness spas existed53to this aerobic fitness movement, even a national chain with spas in most major cities. However, their54was not on aerobics, but rather on weight-training programsdesigned to develop muscular mass, 55, and endurance in their primarily male56. These fitness spas did not seem to benefit57from the aerobic fitness movement to better health, since medical opinion suggested that weight-training programs58few, if any, health benefits. In recent years, however, weight training has again become increasingly. 59for males and for females. Many60programs focus not only on developing muscular strength and endurance but on aerobic fitness as well.61, most physical fitness tests have usually included measures of muscular strength and endurance, not for health related reasons, butprimarily62such fitness components have been related to performance in athletics.63, in recent years,evidence has shown that training programs designed primarily to improve muscular strength and endurance might also offer some health64as well. The American College of Sports Medicine now65that weight training be part of a total fitness program for healthy Americans.请在第__(51)__处填上正确答案。