Which one of the following is the most common reinforcing materia_英语解答

Which one of the following is the most common reinforcing material in FRPs?
A.Al2O3
B.carbon
C.cobalt
D.graphite
E.Kevlar 49
F.SiO2

人气：423 ℃　时间：2020-05-09 05:45:37

解答

玻璃纤维增强塑料中哪个加固材料最常见普通?
应该是碳我有八成把握!B