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什么叫电力系统?电力系统生产的特点是什么?
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真空系统产生的负压环境在升压过程中易产生()。
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如果建造合同结果能够可靠地估计,企业在资产负债表日,确认当期合同收入的方法是()。
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青少年甲亢患者,内科常规治疗药物为()
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毕业论文或设计的课题,可以来自()。
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初产妇,经阴道分娩,会阴侧切,产后6小时,排尿困难。该产妇分娩后3个月,哺乳,应采用的避孕措施是()
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下列前列腺增生的手术指征不正确的是()
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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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模板工程设计的主要原则包括()。
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便秘护理的护理目标,不包括()。