第15题: [单项选择]
根管侧支是指 A. 与主根管成直角走行,贯穿牙本质和牙骨质的根管的细小分支 B. 与主根管成平行的根管分支 C. 根管在根尖分散的细小分支 D. 在单根的两个根管之间相交通的联络侧支 E. 从髓室底发出至根分歧处的管道 参考答案:A 答案解析:根管侧支是指与主根管成直角走行,贯穿牙本质和牙骨质的根管的细小分支。
第24题: [单项选择]Questions 22 to 25 are based on the conversation you have just heard. A. A chemistry experiment. B. A class that the woman is taking. C. A job possibility the woman expecting. D. A study that their chemistry professor did. 参考答案:C 答案解析:[听力原文]22-25 M: Hi, Mary. Do you want to start writing a lab report after we finish this experimen