第5题: [单项选择]切牙位于上、下颌骨的前部,成弧形排列。上颌中切牙(A)与上颌侧切牙(B)比较,下列哪项正确()。 A. (A)的唇面更圆突 B. (A)的舌窝变异大 C. (B)的唇面更圆突 D. (B)的舌窝宽而深 E. (A)的颈嵴比(B)更突出 参考答案:C 答案解析:上颌侧切牙与上颌中切牙形态的主要区别:①唇面窄小而圆突,近中切角为锐角,远中切角呈圆弧形,发育沟不如上颌中切牙明显。②舌面的边缘嵴比中切牙明显,舌窝窄而深,有时有沟越过舌隆突的远中并延续到根面。③邻面
第18题: [单项选择]Questions 11 to 18 are based on the conversation you have just heard. A. They will go to the conference first. B. They will give up waiting for Jane. C. They will wait for Jane for a while. D. They will not attend the meeting today. 参考答案:C 答案解析:[听力原文] W:I can’t understand why Jane isn’t here yet.We agreed to meet at half past ten.It is almo