第18题: [单项选择]People in ancient Greece understood that______. A. some tree bark and leaves could be used as aspirin B. some tree bark and leaves had certain medical effects C. aspirin was a good pain killer D. aspirin could cure arthritis 参考答案:B 答案解析:细节题。由题干ancient Greece可定位至第四段第二句,古希腊人认识到一些树叶和树皮的医疗价值,B)是对这句话的同义转述;由第四段第三句末尾的and it led to the introdu