I am      the government as well as to the general public for just treatment    _peasant-workers,

who have made a great contribution to the improvement of city life.     [ ]

A. asking; on behalf of    

B. applying; in the name of    

C. demanding; in the name of    

D. appealing to; on behalf of

接触器使用中常见的故障有（）灭弧罩松动、缺失、损坏、有滋火声。

A、铁芯或线圈过热

B、铁芯噪声过大

C、触头烧坏或熔焊在一起

D、接触器摇晃