D点高程Hm=43.251m,测得后视读数a=1.000m,前视读数b=2.283m。则视线高Hi和待求点N的高程分别为( )。

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问题 D点高程Hm=43.251m,测得后视读数a=1.000m,前视读数b=2.283m。则视线高Hi和待求点N的高程分别为(    )。

选项 A、45.534m,43.251m
B、44.251m,41.968m
C、40.968m,38.685m
D、42.251m,39.968m

答案B

解析 Hi=HA+a;HB=Hi-b
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