【单选题】患者,上颌双侧磨牙缺失半年,可摘局部义齿修复1个月,主诉义齿翘动。检查:余留牙健康,铸造支架局部义齿设计为双侧第二前磨牙远中 支托三臂卡环,后腭杆大连接体。卡环固位好,基托边缘伸展适当,基托后缘翘动,咬合关系正常。
如果重新义齿修复,防止游离端翘动最有效的措施是()
【单选题】元素 R的核电荷数小于18,他能与氢、氧两种元素形成化合物H 2 R和RO 3 ,则该元素的原子序数是
【单选题】Over the years critical reviews of Bergman's work have______.
A.
without exception been positive
B.
deplored his seriousness
C.
often been antithetical
D.
usually focused on his personality
【简答题】设(A,+,·)是有两个二元运算的代数系统,若(A,+)是阿贝尔群,(A,·)是(),且运算·对运算+是可()的,则称(A,+,·)为环。
【单选题】The conference has been held to discuss the __________ of global warming on people's lives all over the world. [ ]
【简答题】This company's share price has been extremely volatile over the last twelve months.
【单选题】The conference has been held to discuss the ________of global warming on people’s lives all over the world.
【单选题】下面关于牙齿排列的描述哪个是错误的:
C.
牙弓的形状一般可分为方圆形、卵圆形及尖圆形三种
E.
牙齿的倾斜排列可使牙齿在功能性接触中承受轴向的合力
【单选题】Shakespeare’s play Hamlet ______ into at least ten different films over the past years.