简述冷热源的运行操作。

[单选题]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. What is said about the average American in the passage? （）

[单选题]救生艇的编号是左舷为（）

[单选题]下列关于课税标准说法错误的是（　　）。

[多选题]容易加重急性肾损伤的药物是（）

[填空题]数控技术是指用（）对机床运动及其加工过程进行自动控制的一种方法。

[单选题]关于保险经纪从业人员的职业道德的含义，下列描述错误的是（）。

[问答题]当代企业的竞争环境有何特点？

[单选题]治疗阴虚火旺，火不归元证选用六味地黄丸时，最宜选加的药物是（）

[多选题]下列哪些原因会导致Ir光口的光功率过低（　）

[单选题]某旅客于1996年3月10日11：00购买PEK-SHA不定期客票一张，则必须在（　）之间旅行完闭，否则就算无效。

[问答题]简述冷热源的运行操作。

[单选题]调峰热源的运行方式（）。

[判断题]在多热源运行方式情况下，多热源解列运行管理最为简单，多热源并网运行能最大限度地发挥经济运行的优势。

[问答题]简述常见的引起阴燃的热源包括哪些？

[问答题]简述土石坝的运行特点。

[问答题]简述年的金运行模式。

[问答题]请简述郑杭生的社会运行论。

[问答题]简述刮泥机的运行管理。

[问答题]简述我国社会主义法的运行。

[问答题]简述小系统的运行规定。