A.化驗(yàn)準(zhǔn)確 B.采樣準(zhǔn)確 C.計(jì)算準(zhǔn)確 D.記錄準(zhǔn)確
A.0.1 B.0.25 C.0.5 D.1.0
A.6~9 B.6~8.5 C.5.0~7.5 D.6.5~8.5