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在多元线性回归分析中，为什么用修正的决定系数衡量估计模型对样本观测值的拟合优度？
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煤浆泵正常运行中为什么要排气？
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下列关于采购形式的描述，不确切的为（）
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以具体的行动或动作显示出来的偏差行为，被称为（）
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处理解决多阶段最优化问题的数学方法为()。
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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. If your job offers you little stimulation, there are steps you can take（）
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网络管理的重要任务是：和。
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国家对安全生产工作的指导思想是建立安全生产（），实施科技兴安战略，积极采用先进的安全管理方法和安全生产技术，努力实现全国安全生产状况的根本好转。
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飞机的磁航向是指（）
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客户于系统上线后首次经办相关业务时，分行应通过原保管箱系统校验客户身份，同时，在新系统内通过（）交易重置/变更客户身份验证方式。