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“90后”的消费观念、消费行为呈现出鲜明的个性特征。他们追求时尚、个性，标榜“我喜欢”，崇尚“我有我风格”。他们追求和享受品牌，吃要美味、穿要名牌、玩要高档、讲究排场。他们敢于“花明天的钱，圆今天的梦”。分析材料体现了哪些消费心理及做一个理智的消费者要践行哪些原则？
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按精度标准中规定车床尾座套筒中心线必须（）主轴中心线。
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Boredom at Work ① You might find yourself staring at the clock, willing it to move faster so the boring workday will finally end. If your job offers little in the way of stimulation, there are steps you can take inside and outside the workplace. ② If you're bored with your job, it could be a sign that you've mastered the basic requirements and are ready for more of a challenge. You might not have been in your position long enough to request a promotion. Still, you can take steps to enhance your current role. Ask your boss if there are any projects you can help with. Volunteer to train less experienced colleagues. You'll feel more stimulated at work and also increase your chances of future advancement. ③ If you feel there is nothing left to learn in your present position, take steps to increase your knowledge. Your company's website might have online courses you can take during your slow periods, with your manager's permission. Enroll in training classes your company offers in areas that interest you. You also can pursue educational opportunities outside of the workplace, such as college classes, industry-specific training programs or self-improvement courses. If the knowledge you acquire doesn't help you in your present position, it might eventually help you move into a more fulfilling position. ④ Look for ways to challenge yourself. If your job involves performing repetitive tasks, set a quota for the number of times you can accomplish a particular task during the course of a shift. This will give you something to shoot for. If you have co-workers who perform the same tasks, make a friendly wager to see who can do the most. You'll form stronger bonds with your colleagues, and your employer is likely to notice your increased productivity. ⑤ According to psychotherapist and career coach Nina Ham, boredom at work might be a symptom of dissatisfaction with your personal life. Finding sources of stimulation outside of work can have a positive impact on your attitude toward your job. Seeking counseling for an emotional issue can also be of benefit. If your personal life is going well and nothing you try seems to improve your engagement level at work, it might be time to consider a job or even a career change. With your manager′s permission, you can take your company′s online courses during（）
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供应链与传统的（）物流管理有着根本区别。
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申请特种设备作业人员证时，提交的各种材料必须真实，否则即使获得了《特种设备作业人员证》也将被吊销。
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哺乳期妇女预防急性乳房炎的主要措施是（）
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热继电器主要用于电动机的过流保护。
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每克产能营养素在体内氧化所产生的能量值叫（）
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下列哪种药物不宜用于减轻氯胺酮精神症状效果（）