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简述高处作业的级别。
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纯物质T—S图的拱形曲线下部为（）区。
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换药室要求空气中的细菌总数（）
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A few years ago , a sad thing happened. A young American woman left her 21_______for career reasons; she moved far away. For this reason ,a 36-year- old 22_______father has custody of his two children , eleven and eight years old. He works long hours as a 23_______, including weekends. On his days off from work , he goes to a local 24_______college. He' s studying to 25 his job skills so he can make more money for his family. At night he does his homework at the same table as the 26_______. But who takes care of the kids in the evenings when their father is working or 27_______to school? His "extended family"- his mother , other 28_______, and his new girlfriend 29_______out as much as they can. He thinks his girlfriend , who is from Mexico , his home country , is good for his family. He doesn’t want to date "Anglos"or"Anglicized" women because he thinks they value their 30_______over motherhood. He wants a wife with traditional , religious values like his mother.
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在德国新型大学中，哲学博士学位的标准十分严格，它要求申请者必须从事科学研究工作，完成富有创见、对科学发展有所贡献的论文，论文需提交大学教授会主持的（），通过后方可授予哲学博士学位。
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患者，女性，30岁，半年前扭伤左膝关节，后左膝关节内侧疼痛，肿胀逐渐加重，X线见左胫骨上段4cm×5cm大小的透光区，中央有肥皂泡阴影，骨端膨大。近1个月来肿胀明显，但夜间疼痛加剧，关节活动受限，再次拍X线片示胫骨上段病变扩大，肥皂泡沫阴影消失，呈云雾状阴影，肿瘤组织已侵入软组织。手术后应定期进行（）
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办理物业承接验收手续时，建设单位应当向物业服务企业移交什么资料。
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供电系统的自动重合闸，有（）、（）、（），工厂供电系统中一般只采用（）。
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不属于中性粒细胞中毒性改变的是（）
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三尖瓣下移畸形的超声所见是（）