单项选择题

%he basic features of the communication process are identified in one question: Who says ______ through what channel to whom

A．what
B．when
C．how
D．such
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单项选择题
Military orders are ______ and cannot be disobeyed.
A．defective
B．conservative
C．alternative
D．imperative
单项选择题
What you say now is not______ with what you said last week.
A．consistent
B．persistent
C．permanent
D．insistent
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