关于尿液标本的收集,下列说法错误的是()
A.尿常规标本:以清洁容器收集晨尿约100ml
B.收集过程中避免污染
C.收集24h尿液标本时可在容器中预先放防腐剂
D.24h尿液标本需摇匀后再取样送检
正确答案是A
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