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脱硫系统紧急停车，对反应器应采用（）的置换方法
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Questions 26 to 30 are based on the following passage. Exercise is one of the few factors with a positive role in long-term maintenance of body weight. Unfortunately, that message has not gotten through to the average American, who would rather try switching to “light” beer and low-calorie bread than increase physical exertion. The Centers for Disease Control, for example, found that fewer than one-fourth of overweight adults who were trying to shed pounds said they were combining exercise with their diet. In rejecting exercise, some people may be discouraged too much by caloric-expenditure charts: for example, one would have to briskly walk three miles just to work off the 275 calories in one delicious Danish pastry (小甜饼). Even exercise professionals concede half a point here. “Exercise by itself is a very tough way to lose weight,” says York Onnen, program director of the President’s Council on Physical Fitness and Sports. Still, exercise’s supporting role in weight reduction is vital. A study at the Boston University Medical Center of overweight police officers and other public employees confirmed that those who dieted without exercise regained almost all their old weight, while those who worked exercise into their daily routine maintained their new weight. If you have been sedentary (极少活动的) and decide to start walking one mile a day, the added exercise could burn an extra 100 calories daily. In a year’s time, assuming no increase in food intake, you could lose ten pounds. By increasing the distance of your walks gradually and making other dietary adjustments, you may lose even more weight. Some people dislike exercise because （）
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高分子材料分子量很大，是由（），并以（）的形式重复连接而成。
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当系统采用总线制时，总线电缆宜采用不少于6芯的通信电缆，每芯截面积不宜小于（）。
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缺乏安全技术教育，违反（），是企业内运输事故原因之一。
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下列多发性肺囊肿的X线表现中，错误的是()
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实行会员分级结算制度的期货交易所会员由（）组成。
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每本验标中的术语包括（）和（）两部分。
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酶质量测定较酶活性测定的优点不包括（）
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侨社成立于下面哪一年：（）