单项选择题

What is not the element in defining language

A. systemic

B. arbitrary
C. symbol

D. visual
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单项选择题
The famous _____ Gold Rush began in the U. S. in the mid-nineteen century.
A. New York State
B. California
C. Pennsylvania
D. Texas
单项选择题
Degradation can be illustrated by the following example______
A. lewd → ignorant
B. silly → foolish
C. last → pleasure
D. knave → boy
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