如图,已知地面水准点A的高程为HA=142.100m, 若在基坑内B点测设HB=130.000m,测设时 a=1.415m,b=13.365m, a1=1.205,问当b1为多少时,其尺底即为设计高程HB?题3附图
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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