第2题: [单项选择]Why scientists say no to GM cotton A. Because the cotton was genetically modified. B. Because the cotton was found to damage the environment. C. Because the cotton harms the bollworm. D. Because Monsanto dismissed the research. 参考答案:B 答案解析:第二段中谈到,中国科学家发现Bt棉花会永久性地伤害环境,并会使昆虫累积抗性,因此在国际间就引发了一场争论。可见,只有B是正确的。