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各个法律部门都有自己的主旨思想，经济法的主旨思想是()
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类风湿关节炎的滑膜病变特点是（）
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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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裂解汽油加氢装置停蒸汽时关闭BTX（脱碳九）塔蒸汽喷射泵工艺侧阀门是为了防止系统向空气中泄漏。
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下列不包括地球的天体系统是（）
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电子式结冰探测器是用以下方法探测结冰状况的：（）.
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下列问题对管理者的伦理行为影响较大的是____。
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学校自主课程开发机制，也叫校本课程开发机制，它是以学校教师为主体自主开发学校课程。
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《建筑工程工程量清单计价规范（2008）》规定建设工程造价由（ ）组成。