______is the knowledge of the rules of an ideal speakers language.
A. Performance
B. Capacity
C. Ability
D. Competence
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下列防腐剂中对霉菌的抑菌能力较好的是()
A. 尼泊金类
B. 乙醇
C. 山梨酸
D. 苯甲酸
E. 甘油
纳米乳粒径范围为()
A. <1nm
B. 10~100nm
C. 100~500nm
D. 500~1000μm
E. 1~100μm
Which of the following is NOT a design feature of human languages?
Arbitrariness.
B. Displacement.
C. Duality.
Diachronicity.
下列关于絮凝度的错误表述为()
A. 絮凝度是比较混悬剂絮凝程度的重要参数,用卢表示
B. β值越小,絮凝效果越好
C. β值越大,絮凝效果越好
D. 用絮凝度可评价混悬剂的絮凝效果
E. 用絮凝度可预测混悬剂的稳定性