单项选择题


A．role
B．duty
C．part
D．function
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单项选择题
A．yieldB．preferC．adaptD．refer
A．yield
B．prefer
C．adapt
D．refer
单项选择题
A．in generalB．in conclusionC．on the contraryD．that is to say
A．in general
B．in conclusion
C．on the contrary
D．that is to say
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