A.105% B.70% C.65% D.60%
A.20 B.25 C.30 D.50
A.不得低于标准值 B.允许+50%~-10% C.允许+10%~-10% D.允许+10%~-5%
A.Ⅰ、Ⅱ、Ⅲ、Ⅳ B.Ⅱ、Ⅲ、Ⅳ C.Ⅰ、Ⅱ、Ⅲ D.Ⅰ、Ⅱ、Ⅳ
A.120%B.115%C.110%D.105%