单项选择题

A) essential C) reliable
B) available D) responsible

A．essential
B．available
C．reliable
D．responsible
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单项选择题
A) ideological C) social B) biological D) psychological
A．ideological
B．biological
C．social
D．psychological
单项选择题
A) As a result C) In other words B) After all D) Above all
A．As a result
B．After all
C．In other words
D．Above all
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