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【单选题】
关于外科感染分类的叙述,以下哪错误的A.
丹毒、急性阑尾炎、急性乳腺炎等均属异性感染
B.
急性感染是指病程在3以内
C.
条件性感染是指平时的非致病菌在机体抵抗力下降时乘机而入引起的感染
D.
二重感染是一种条件性感染
E.
病程超过2个月者为慢性感染
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