• 2021-04-14
    1189.在AB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 =-0.009m,已知A点的高程为 =417.462m,则( )。909369381b6424b11dd3da72c4f75ed9.jpg216832fc3f37028085c6917a03be58b2.jpg