A.花桿 B.木樁 C.測(cè)釬 D.水準(zhǔn)尺
A.系統(tǒng)誤差 B.偶然誤差 C.粗差 D.多余誤差
A.1/100~1/200 B.1/200~1/300 C.1/300~1/400 D.1/400~1/500