回家问问长辈,情况就清楚了。。
除了转基因尚未问世,七十年代初农村已经有除草剂,化肥农药,生长刺激素,我也都用过。
回家问问长辈,情况就清楚了。。
除了转基因尚未问世,七十年代初农村已经有除草剂,化肥农药,生长刺激素,我也都用过。
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