A.通用級PS(GPS) B.高抗沖擊級PS(HIPS) C.可發(fā)性PS(EPS) D.耐熱PS
A.5~15% B.10% C.大于20% D.大于30%
A.丁二烯 B.乙烯 C.丙烯 D.氯乙烯