A. details such as times were not recorded in the past B. they are much better C. the ancient runners fell down dead D. the Greeks had no means of telling the time 参考答案:A 答案解析:[解析] 推断题。第三段最后一句指出,“他们的成绩与现在相比如何,很可惜我们无法知道”(How their results compared with modern standards,we unfo
第6题: [单项选择]慢性根尖周致密性骨炎() A. 根尖周多囊性透影区 B. 根尖周弥散性透影区、边缘不整齐 C. 根尖周边界清晰的阻射线 D. 牙槽骨破坏、硬板消失、骨小梁变细、牙周间隙增宽 E. 根尖周有圆形或椭圆形的边界清晰的透影区 参考答案:C