A.3~5% B.5~10% C.40~50% D.90~95%
A.小于1 B.1.23~1.28 C.1.5~2.0 D.2.0~2.5
A.0.75~0.85 B.1.00~1.20 C.1.20~1.40 D.1.40~1.60