M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:()
A:45.534m,43.251m
B:40.968m,38.685m
C:44.251m,41.968m
D:42.251m,39.968m
出自:基础考试