A.91°45′24″ B.268°14′36″ C.148°17′00″ D.91°14′36″
A.A點(diǎn)比B點(diǎn)高0.435m B.A點(diǎn)比B點(diǎn)低0.435m C.A點(diǎn)比B點(diǎn)高2.899m D.A點(diǎn)比B點(diǎn)低2.899m