单项选择题
A.GB/T 21198.6B.GB/T 17832C.GB/T 15072.1D.GB/T 25934.1
A.GB/T21198.1 B.GB/T21198.6 C.GB/T19720 D.GB/T9288
A.80.0%-99.5% B.70.0%-90.5% C.90.0%-99.5% D.80.0%-90.5%