缩孔是指() ["支架表面粗糙","支架表面与磺砂牢固结合在一起的现象","由于体积收缩在支架表面或内部留下的孔穴","砂粒在铸件表面域内部造成孔穴","支架卡环铸造不全"]
上前牙金属烤瓷冠牙体预备,切端至少磨除() ["1mm","1.5mm","2mm","2.5mm"]
经水涩少的主要症状,下列哪一项是错误的() ["月经周期正常","经量明显少于既往","经期缩短不足2天","月经点滴即净","月经周期缩短"]
患者,男,19岁。患者突然昏倒,不省人事,口吐涎沫,手足抽搐,大小便失禁,约2~3分钟后苏醒,醒后自觉头晕、头痛、嗜睡、疲倦乏力。以后每月大发作几次,每日数次小发作。脑电图诊断为:病灶性瘸症(左侧半球病灶)。为了确定癫痫病灶的具体部位可以做什么检查() ["A.CT","MRI","经颅多普勒超声","rCBF显像","PET脑代谢显像","血脑屏障显像","脑脊液显像"]
可摘局部义齿支架打磨抛光的要点不正确的是() ["由粗到细","压力适当","注意降温","走向一致","先打磨再喷砂"]
位错是()缺陷、晶界是()缺陷。