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四环素差向异构化是由于A环上手性碳原子C4构型的改变
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文书的部分文字被()、()等有色物质涂抹掩盖,形成()。显现、识别案件中被涂抹文字,首先应鉴别书写原字的工具和材料、掩盖物质的颜色和性质、涂抹的方法、掩盖的程度及纸张的质量等,然后再选择相应的显现方法显现被涂抹文字。
材料一:2004年以来新疆连续6年保持生产总值两位数增长,2010年达到4274亿元人民币,特别是粮食、水果、畜牧业等现代农业快速发展。各族人民的团结奋斗实现了新疆经济社会又好又快发展。 材料二:乌鲁木齐市2009年7月5日发生打砸抢烧严重暴力事件,9月3日外交部发言人说,中国政府依法处理“7.5”事件,依法保护中国公民的生命财产安全、维护社会稳定、民族团结、国家统一,是正义之举,是中国内政,任何外国和国际组织都无权干涉中国内政。今天,经过乌鲁木齐“7·5”事件洗礼的全疆各族人民更加清醒地认识到,国家统一、民族团结、社会稳定是新疆各族人民发展进步的生命线。 结合材料,运用国际社会和我国外交政策的相关知识,分析“任何外国和国际组织都无权干涉中国内政”的正确性。
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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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