这是证据？瞎扯。BT为最没有危害风险的生物农药，那20%是留给害虫，减少可能对BT抗性的基因突变

来源: busboy 于 2014-05-29 22:10:05 [旧帖] [给我悄悄话] 本文已被阅读：次

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