A.GB/T10001.1、GB/T10001.2、GB/T10001.3 B.GB/T10001.1、GB/T10001.3、GB/T10001.5 C.GB/T10001.1、GB/T10001.3、GB/T10001.7 D.GB/T10001.1、GB/T10001.3、GB/T10001.10
A.每年 B.每次使用前 C.每次使用后 D.每次使用一次
A.5min B.10min C.15min D.20min