题目: Having retired, he ________ the club for old men and played chess every day there.[ ]A.joined B.took partC.attended D.participated 答案: 答案:A
题型:单项选择题 由下颌中切牙、侧切牙切嵴,尖牙的尖,第一、第二前磨牙颊尖,第一、第二磨牙近中颊尖、远中颊尖连成的一条向上凹的线称为()。A.Spee曲线B.曲线C.横曲线D.平面E.补偿曲线 查看答案