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点的高差hMN和待求点N的高程HN分别为:A. 1. 283m ,44. 534mB. -3. 283m,39. 968mC. 3. 283m ,46. 534mD. -1. 283m,41. 968m

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点的高差hMN和待求点N的高程HN分别为:

A. 1. 283m ,44. 534m
B. -3. 283m,39. 968m
C. 3. 283m ,46. 534m
D. -1. 283m,41. 968m

参考解析

解析:提示:HB=HA+hAB=HA+(a-b)。

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