A.8%~10% B.3%~4% C.12%~14% D.14%~16%
A.強(qiáng)度低; B.水穩(wěn)性差 C.容易開裂; D.耐磨性差
A.越小越好; B.越大越好; C.應(yīng)有一定范圍; D.與劑量多少無關(guān)