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下列系统中，在青春期开始后才迅速发育的是（）
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1岁患儿，夏季因发热3d伴抽搐1次入院。体温39．5℃，神志清，血压正常，颈部略有阻抗。开塞露通便后，粪便镜检显示每高倍视野白细胞6～8、RBC2～3。入院当晚出现频繁抽搐，由嗜睡很快进入昏迷状态。脑脊液外观清，白细胞100×106／L，中性粒细胞60％，淋巴细胞40％，糖2．8mmol／L，氯化物120mmol／L，蛋白700mg／L。外周血白细胞20．0×109／L，中性粒细胞80％。应拟诊为（）
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总体均数置信区间的宽度取决于（）.
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普通电动机用于变频调速后需适当降容，降容的原因是（）。
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上门收款服务证由（）保管
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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 you′re bored with your job, it shows that you′ve mastered（）
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疑有甲亢的病人，2个月前曾作胆囊造影，为确定有无甲亢，下列哪项试验最有价值（）
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石英砂加工企业生产过程中包括破碎、粉碎、筛分、分装等生产环节，其工作场所存在的粉尘主要是（）。
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我国古代拥有高超的造船技术，很早就可以造出能容纳大量人员的船只。请问，唐代建造的大船已可乘多少人？（）
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简述EAM系统设备拆件流程。