设计压力为B级的中压燃气管道，其压力范围是下列哪一项？()
A.0.2MPa＜p≤0.4MPa B.0.1MPa≤p≤0.2MPa C.0.01MPa≤p≤0.2MPa D.0.2MPa＜p≤0.5MPa正确答案C
设计压力为B级的中压燃气管道，其压力范围是下列哪一项？()
A.0.2MPa＜p≤0.4MPa B.0.1MPa≤p≤0.2MPa C.0.01MPa≤p≤0.2MPa D.0.2MPa＜p≤0.5MPa正确答案C
