如图所示，已知水准点BMA的高程HA=48.602m，欲求B点高HB。 
正确答案:
h1=a1-b1=1.507-1.121=0.386m
h2=1.479-0.973=0.506m
h3=a3-b3=0.556-1.431=-0.875m
h4=a4-b4=1.112-0.773=0.339m
hΣ=0.386+0.506+0.339-0.875=0.356m
hB=HA+hAB=48.602+0.356=48.958m
答：B点的高程是48.958m。
h2=1.479-0.973=0.506m
h3=a3-b3=0.556-1.431=-0.875m
h4=a4-b4=1.112-0.773=0.339m
hΣ=0.386+0.506+0.339-0.875=0.356m
hB=HA+hAB=48.602+0.356=48.958m
答：B点的高程是48.958m。
答案解析:有
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