单项选择题


A．visional
B．perceivable
C．seen
D．visible
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单项选择题
A．swarmsB．flocksC．crowdsD．groups
A．swarms
B．flocks
C．crowds
D．groups
单项选择题
A．by the exception ofB．in the exception ofC．with the exception ofD．without the exception of
A．by the exception of
B．in the exception of
C．with the exception of
D．without the exception of
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