The river smells terrible.People must ________dirty things into it.[ ]

A. be stopped to throw

B. be stopped from throwing

C. stop to throw

D. stop from throwing

耐油性能最好的橡胶制品是（）。

A.天然橡胶件

B.氮丁橡胶件

C.丁苯橡胶件

D.丁腈橡胶件