It is widely reported in the western media that the drug ______ is now becoming a leading cause of teenager crimes.  

A．adoption

B．abuse

C．appreciation

D．appeal

钢结构防腐涂料涂装前表面除锈应符合设计要求和国家现行有关标准的规定。处理后的钢材表面不应有（）。

A.焊渣

B.焊疤

C.灰尘

D.油污

E.磨痕