Several detrimental effects of GM crops had been shown on the metabolism of animals. The hazard of GMOs was shown for animals and the environment in ( ) investigations.
A.intensive B.sensitive C.external D.extensive正确答案D
Several detrimental effects of GM crops had been shown on the metabolism of animals. The hazard of GMOs was shown for animals and the environment in ( ) investigations.
A.intensive B.sensitive C.external D.extensive正确答案D
