A.算術(shù)B.知識(shí)C.數(shù)字符號(hào)D.數(shù)字廣度
A.項(xiàng)目分辨力B.項(xiàng)目成本C.方差D.項(xiàng)目難度
A.0B.0.5左右C.0.9左右D.1