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题目：
单选题
A执行DOS内部命令
B执行DOS外部命令
C执行DOS所有命令
D基本输入输出
答案：
<查看本题扣1积分>
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在患者出现胃气上升感之后3秒，EEG可见F8、T4出现6Hz的θ节律，波幅渐增，逐渐演变为尖波节律，4秒后有吞咽伪差混入，约50秒左右发作结束，此描述提示发作可能起源于（）。
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认知安全电路并说出原理？
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磺酰脲类降糖作用的主要机制是（）
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下述血气参数中，哪一项最能反映肺通气状况（）
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以下不属于按相生规律确定的治法是（）。
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下列经济活动产生的现金中，不属于筹资活动产生的现金流量是（).
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病史的主体部分是（）
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将胶片用纸包好，置于盛有石灰的干燥箱中目的是（）
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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 involves（）, set a quota for the number of times you can accomplish a particular task.
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电气化区段接地装置按其作用分可分为几种？