There is someone _________ the door.[ ]
A. in
B. on
C. to
D. at
答案:D
患者,右下456缺失,缺隙的近远中径过窄,可摘局部义齿修复。排列人工牙时,下列正确的是()
A.右下456三牙平均减径后排列
B.右下45二牙减径后排 * * 牙
C.右下56二牙减径后排 * * 牙
D.右下46孺二牙减径后排 * * 牙
E.减数法,只排列右下45二牙
适合于扑救驾驶室,精密仪器,配电盘着火的灭火剂是()
A.干粉
B.泡沫
C.CO2