I never think myself a stupid boy. ______, I know I’m on the road to success.  [ ]

A. On the other hand      

B. In other words    

C. On the contrary        

D. By the way

根据《电气装置安装工程旋转电机施工及验收规范》（GB50170-2006），采用条形底座的电机应有（）个及以上明显的接地点。

A.1

B.2

C.3

D.4