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试述利用逐个检出法检出营养缺陷型的主要步骤及其原理。
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抑制尿酸形成可用（）
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压缩机正常运行时，电机消耗的电能用来实现（）
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预防胃内容物反流和误吸的措施，哪项不常用（）。
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常见的钢的淬火缺陷有哪些？
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由变压器电抗的计算公式可知：变压器电抗X与频率f成正比.当50Hz变压器接到60Hz电源上时，其电抗为原来的（）倍。
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舵机安全阀能通过流量应不小于（）液压泵总流量，这时压力升高量不应超过（）.
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男性病人，2周前出现右膝部间歇性疼痛和肿胀，拒按，休息后不缓解，且逐渐出现轻度跛行，X线可见右股骨下段骨质破坏，边界模糊，可见Codman三角，被高度怀疑患有骨肉瘤。若该病人被确诊为骨肉瘤，首选的治疗方法是（）
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Choose the best words into the sentences. Sudan is the only male northern white rhino (犀牛) left in the world. That (mean) Sudan, 42, is the last hope for avoiding extinction. (protect) him, officials have placed him under 24-hour armed guard at the OI Pejeta Conservancy in central Kenya. Sudan lives there two female northern white rhinos, Fatu and Najin. Northern white rhinos, can weigh up to 5,000 pounds, were once plentiful across northern and central Africa. (hunter) have killed thousands of rhinos because of high demand for the animals，horns (角). Rhino horns, believed to have medical effects, are used in (tradition) Asian medicines. More than 1,000 rhinos (kill) in 2014 in South Africa alone and fifty-four rhinos in Kenya, which has a much (small) population. Sudan, Fatu, and Najin have had their horns (remove) so that they will not be hunted. People hope Sudan and one of the females will be able to have a baby. Sudan is very old, but scientists will not give up hope.
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如何健全各项内控制度？