矿用三牙轮钻头按牙轮数目可分为()种。
A.三
B.四
C.五
D.六
参考答案:C
Tuesday being _________ windy, cold day in Beijing, the President tours _______ Forbidden City in Beijing, wearing ________ blue shirt with no tie and a casual leather jacket.
A.a; the; the
B.a; /; a
C./; /; a
D.a; the; a
患者,女,62岁,全牙列缺失,全口义齿修复,口腔检查该患者下颌牙槽嵴低平。
该患者全口义齿戴入一周,因口腔黏膜疼痛就诊,疼痛的原因,叙述错误的是 ()
A.人工牙牙量相对过大
B.人工牙牙合面相对过宽
C.垂直距离过低
D.倒凹相对的基托组织面缓冲不够
E.基托过长