单项选择题

______ is a system of arbitrary vocal symbols used for human communication.

A．Linguistics
B．Syntax
C．Morphology
D．Language
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单项选择题
The state of California is on ______.
A．the Atlantic Coast
B．the Gulf of Mexico
C．the Pacific Coast
D．Carribean Sea
单项选择题
The writer thinks that the growth of specialist societies and periodicals had helped scholars to ______.
A．cut down research costs
B．keep up with current developments
C．spend less time travelling
D．develop their ideas more quickly
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