GRE Text Completion: ETS Fundamental-GRE填空ETS基础 - MM0BP088Q7SP76K5X

Once a duckling has identified a parent, the instinctive bond become a powerful (i)____________ for additional learning since, by (ii)____________ the parent, the duckling can acquire further information that is not genetically transmitted. A. inspiration B. acknowledging C. channel D. mimicking E. impulse F. surpassing