已知A+B=M+N;△Hθ1=35KJ•mol-12M+2N=2D;△Hθ2=-80KJ•mol-1则A+B=D的△Hθ3是
M点高程Hm=43.251m,测得后视读数a=1.000m,前视读数b=2.283m。则N点对M点的高差hMN和待求点N的高程HN分别为:()
免费的网站请分享给朋友吧