M点高程HM=43.251m,测得后视读数a=1.000m,前视读数b=2.283m。则N点对M点高差hMN和待求点N的高程分别为:

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问题 M点高程HM=43.251m,测得后视读数a=1.000m,前视读数b=2.283m。则N点对M点高差hMN和待求点N的高程分别为:

选项 A、1.283m,44.534m
B、-3.283m,39.968m
C、3.283m,46.534m
D、-1.283m,41.968m

答案D

解析 hMN=a-b=1.000-2.283=-1.283m
HN=HM+hMN=42.251+(-1.283)=41.968m
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