一次性使用集尿袋的尿袋容积允许误差为()
A.±5%
B.±10%
C.±15%
D.±20%
E.±25%
参考答案:C
解析:[知识点] 一次性使用集尿袋
Each girl present at the party was wearing a flower in the hair, which _______ their beauty.
A.added
B.added up
C.added to
D.added up to
一般情况下,我国法律不具有溯及既往力。