第3题: [单项选择]The last paragraph implies that _________. [A] we should have high goals [C] success means taking a walk in the park [B] success means achieving great goals [D] success means trying one's best at what one really likes
第17题: [单项选择]患者男性,8岁,因“1小时前滑冰时不慎撞伤上前牙”来诊。口腔检查:右上1近中切角缺损,断面中心有一小红点,直径约0.5mm,探诊敏感,伴少量渗血。X线片:未显示根折及牙槽骨骨折,患牙根尖孔未发育完全。关于活髓保存,叙述错误的是() A. 牙髓切断术是过渡性方法,待根尖发育完成后宜行根管治疗 B. 直接盖髓失败的年轻恒牙可改行活髓切断术 C. 外伤露髓范围较小的患牙可行直接盖髓术 D. 龋源性露髓的成熟恒牙首选直接盖髓术 E. 牙髓钙化和内吸收是活髓保存治疗常见的并发症 参考答案:D