患者,男,59岁,全牙列缺失,全口义齿修复。若缓冲区未作缓冲处理,最可能出现的后果是()
A.疼痛
B.义齿翘动
C.义齿咀嚼功能不良
D.义齿纵折
E.恶心
参考答案:A
The father as well as his three children _____ skating on the frozen river every Sunday afternoon in winter.[ ]
A. is going
B. go
C. goes
D. are going
电动执行器由()、()、()和()等部分组成。