题目内容

简述乳剂的形成理论。

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In traffic lights, red can only mean stop. But in human languages, limited phonemes can form. numerous words which can form. unlimited sentences. This is a good illustration of the______feature of language.

A. duality
B. displacement
C. arbitrariness
D. productivity

Which of the following isnt a major branch of linguistics？

A. Phonetics
B. Pragmatics
C. Speech
D. Sociolinguistics

______is the knowledge of the rules of an ideal speakers language.

A. Performance
B. Capacity
C. Ability
D. Competence

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