environmental distruction, Saleem              making profits.[ ]

A. In spite of, was obsessed of

B. Regardless of, was obsessed with

C. Despite of, had an obsession with

D. For all, had an obsession of

抗冲共聚物生产时，Ec主要靠第二反应器（）调整。

A、氢气丙烯比

B、产率比

C、乙烯丙烯比

D、氮气浓度