词数:501难度系数:★★★☆☆参考时间:5分钟A recent study claiming that genetically modified(转基因)corn caused tumors(肿瘤)in rats is drawing a chorus of criticism from scientists around the world.The debate comes as voters in the US state of California consider whether to require labels on all food with ingredients from genetically modified organisms(GMOs).Rats fed on GM corn for two years grew giant tumors in this study in the journal. Word Count: 501 Difficulty Factor: ★★★ ☆☆ Reference Time: 5 minutes A recent study claiming that genetically modified (caused by corn) tumors in drawing a chorus of criticism from scientists around the world. Debate as voters in the US state of California consider whether to require labels on all food with ingredients from genetically modified organisms (GMOs). Rats fed on GM corn for two years for giant tumors in this study in the journal.