间接致癌物是()
A.β-丙烯内酯
B.β-萘胺
C.镍
D.佛波酯
E.乙烯雌酚
参考答案:B
A. DecemberB. holidayC. MondayD. fallE. summerF. JuneG. Sunday
It’s the hottest season of a year.
熟料慢冷,熟料矿物可能减少的有()
A、C3S
B、β-C2S
C、C3A
D、γ-C2S