單項(xiàng)選擇題對(duì)某試樣進(jìn)行平行三次測(cè)定,得CaO平均含量為30.60%,而真實(shí)含量為30.30%,則30.60%-30.30%=0.30%為()

A.相對(duì)誤差
B.絕對(duì)誤差
C.相對(duì)偏差
D.絕對(duì)偏差