A.10% B.20% C.30% D.50%
A.地形變換點(diǎn)未測(cè)點(diǎn) B.地形點(diǎn)間地面坡度不一致 C.測(cè)量的地形點(diǎn)太密 D.棱鏡桿未豎直、讀數(shù)不準(zhǔn)確
A.0.3mm B.0.5mm C.0.6mm D.0.9mm