人工关节置换术后最常见的并发症是
A.泌尿系感染
B.骨折
C.急性肾衰竭
D.膀胱损伤
E.胃肠道出血
参考答案:A
解析:人工关节置换术后最常见的并发症是泌尿系感染。
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A.receiving
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稳压管和整流二极管工作时有什么不同?