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四季豆发荧光,有毒?真相来了
调查问题加载中,请稍候。 若长时间无响应,请刷新本页面 工作人员从农贸市场、超市随机购买10份四季豆,用365nm紫外灯进行照射。结果发现:8份样本表面出现明显的蓝色荧光,2份出现零星荧光。这荧光难道真的是含铜的农药残留? 实验一:含铜农药是“背 ...
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