(单选题)同一坡度两个地形点的高程分别为20.4m和27.3m,若等高距为2m,则通过两点间的等高线的高程应含有()

A23.4m,25.4m

B22.4m,24.4m,26.4m

C21m,23m,25m,27m

D22m,24m,26m

答案解析