第9题: [单项选择]According to the passage, _________ may prevent Alzheimer's disease. A. physical exercise B. diet C. operation D. anti-inflammation medicines 参考答案:B 答案解析:[注释] 理题。文章第二段提到“…research increasingly suggests that diet may be important in preventing Alzheimer's
第31题: [单项选择]A. A lesson requires student’s active involvement. B. Students usually take an active part in a lecture. C. More knowledge is covered in a lecture. D. There is a larger group of people interested in lesson. 参考答案:A 答案解析:[解析] W: What’s the difference between a lecture and a lesson M: Well, both of them are impar