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高强螺栓初拧扭矩值宜为终拧扭矩值的（）。
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下列激励形式中属于精神激励形式的是（）
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耕地占补平衡制度，是保证耕地总量不减少的重要制度。
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原发性代谢性碱中毒的预计代偿公式是（）
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透过率在0.48μm处最大，在0.5~0.6μm内，光对清洁水的穿透深度约为（）m。
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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。
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我国在20世纪80年代中期引入的产业分类（）。
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以下关于附息债券的说法正确的是（ ）
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发生煤气中毒应如何处置？
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用鸡蛋清打发起泡，再用淀粉调制的糊，是（）。