单项选择题

A) diversity C) generalization
B) extinction D) degradation

A．diversity
B．extinction
C．generalization
D．degradation
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单项选择题
A) opportunity C) courtyard B) perform D) forum
A．opportunity
B．perform
C．courtyard
D．forum
单项选择题
A) identity C) identification B) identifiers D) ideology
A．identity
B．identifiers
C．identification
D．ideology
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