A.2 B.3 C.4 D.2.5
A.1/4 B.1/2 C.1/3 D.1/5
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