单项选择题

[b] in debate and [i] in delate can be said to form a(n) ______.

A．phonemic contrast
B．complementary distribution
C．assimilation rule
D．sequential rule
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单项选择题
The ______ feature is considered central to human language, which means two levels of structure or patterning .
A．duality
B．arbitrariness
C．displacement
D．creativity
单项选择题
______ is a major city in the sooth - east of New York state and comprises five boroughs, one of which is Manhattan, the economic and cultural heart of the city.
A．New York
B．Los Angeles
C．Seattle
D．Dallas
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