以下场所中的（）的接地干线应不少于两处与接地体联结。
A.火灾危险环境
B.变配电所
C.爆炸性气体环境
D.消防控制窜
参考答案：A, B, C
—The book green cover is more interesting.
—Yes. its writer is less popular now.
A．with; Although
B．with; Because
C．of; Although
D．of; Because
结构的设计基准期
