I was born              and began to study at this school             .       [ ]

A. in 1970; in the 1980                

B. in the 1970; in 1980s          

C. in 1970; in the 1980s                

D. in 1970s; in the 1980s

电力管理部门应当按照国务院有关电力设施保护的规定，对电力设施保护区设立（）

A.标志

B.围栏

C.专门机构

D.检查站