M点高程HM = 43. 251m,测得后视读数a=1. 000m,前视读数b=

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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点的高差hMN和待求点N的高程HN分别为:

选项 A. 1. 283m ,44. 534mB. -3. 283m,39. 968mC. 3. 283m ,46. 534mD. -1. 283m,41. 968m

答案D

解析提示:HB=HA+hAB=HA+(a-b)。
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