第4题: [多项选择]关于在搜索时，“”和“*”代表的意义，下列说法正确的是( )。 A. 搜索时，文件名和扩展名中可以使用通配符和*表示一批文件 B. “”表示问号所在位置上所有可能的字符 C. “*”代表它所在位置及其后位置上一串任意字符 D. 在Windows中进行搜索时，如果输入文件名时，忽略扩展名，则和*没有任何区别 参考答案:A,C,D 答案解析:[解析] “”表示问号所在位置上所有可能的1个字符。
第6题: [单项选择]A The language they are written in is not widely known.
B They cannot be moved from where they were found
C The writing in them has faded
D Many people want credit for the discovery. 参考答案:A 答案解析:[听力原文]
What has made it difficult to study the manuscripts
第8题: [单项选择]Which of the following is NOT the difference between Bt cotton and common cotton A. Bt cotton is stronger than common cotton. B. Bt cotton yields more than common cotton. C. Bt cotton needs less pesticides than common cotton. D. Bt cotton is harm to cotton bollworms. 参考答案:A 答案解析:第七段中谈到GM棉花能增产60%，并降低80%的杀虫剂需要量。在第四段中说到，GM棉花中的一个基因对棉铃虫有抗性。根据排除法，选A。
