在A、B两点之间进行水准测量,得到满足精度要求的往、返测高差为hAB=+0.005m, hBA=-0.009m。已知A点高程HA=417.462m,则(   )。 
·B的高程为417.460m;  
·B点的高程为417.469m;  
·往、返测高差闭合差为+0.014m,
·点的高程为417.467m  
·往、返测高差闭合差为-0.004m。 

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