A.4.55% B.31.73% C.15.865%
A.4.55% B.2.275% C.0.27%
A.欲控系統(tǒng)因素發(fā)生發(fā)生 B.非控系統(tǒng)因素發(fā)生發(fā)生 C.其它因素發(fā)生