Customers may think that genetic engineering of foods is somethin

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Customers may think that genetic engineering of foods is something new, but humans have been modifying plants for ages; the _____ is not that new genes are imported but that genes can now be deleted from one species to another.

A、novelty
B、quandary
C、advantage
D、innovation
E、discrepancy
F、predicament

答案：A,D

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