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科技苑【20140828】看点介绍
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科技苑20140828集剧情：第20140828期
新鲜的葡萄上，为啥挂着一层白粉?是农药，还是?专家给您支招：如何选到好葡萄。CCTV-7 8月28日 18:30 《科技苑》之《怎样挑选好葡萄》敬请收看。rn
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