第29题: [单项选择]活髓牙牙体预备后,暂时冠最好用哪种粘固剂( ) A. 丁香油糊剂 B. 磷酸锌水门汀 C. 聚羧酸水门汀 D. 玻璃离子水门汀 E. 以上均不正确 参考答案:A 答案解析:[解析] 用丁香油糊剂粘固暂时冠是较好的方法,既可避免再度刺激牙髓,安抚已受激惹的牙髓,又可保护患牙的牙位和修复间隙,为戴冠提供便利。
第33题:[单选题]What does the word “electives" mean in Paragraph 2? D A.Selections. B. Having the power to elect. C. Working by means of election. D. Courses chosen by students rather than compulsory ones. 参考答案:D