问题 单项选择题

固定桥的稳定是指()

A.口腔行使各种功能运动时,基牙及支持组织不发生下沉、松动、移位等

B.基牙牙冠形态正常,龈高度足够,轴壁聚合度较小,具备良好的固位

C.固位体具备足够的摩擦力、粘结力和约束力

D.口腔行使各种功能运动时,能够抵抗外力,不致松动或脱落,固位体牢固地固定在基牙上

E.在口腔行使各种功能运动中受到各个方向外力时,能够保持固定桥的平衡而不会出现翘动

答案

参考答案:E

解析:1.备选答案B、C容易混淆,固定桥的固位依靠摩擦力、粘结力和约束力的协同作用。2.固定桥的稳定容易与固位的概念混淆,固位是针对固位体而言,稳定是指在口腔行使各种功能运动中受到各个方向外力时,固定桥作为一个整体可以抵抗旋转运动,保持平衡稳定而不会出现翘动。稳定与固位有密切的关系,固定桥一旦出现翘动,很容易破坏粘固剂的封闭作用和锁结作用,破坏了固位体的固位。3.固定桥的支持是针对基牙及支持组织而言的。

多项选择题
完形填空
A man was driving at 70 miles in a 40-mile zone(区域), when a   36  came behind him. Right away the man started thinking of   37  to give.
As the policeman came to him, he said, “Hi, officer, I guess you   38  me a little bit over the speed limit(限制). I was in a rush to get   39  , to be with my wife and kids. You know my younger son wasn’t feeling too   40  when I left home this morning. I’m afraid he’s ill.”
The policeman said, “Well, I guess so,” and started   41  something in his notebook. As minutes went by, he could see from the side view mirror, the policeman was   42  writing. When the man was wondering why he hadn’t asked for his driving   43  so far, the policeman came to his window,   44  him a piece of paper, and returned to his car without saying a single word. The man wondered: how much was this   45   going to be? However, the man was   46  it was not a ticket at all and he began to   47  :
“I had a daughter who was   48  by a speeding car at the age of six by a speeding driver. He got a fine, a few months in   49  , and then was free, free to hug(拥抱) his two daughters. I only had one, and now I have to   50  until I get to heaven before I can hug her again. I have tried to   51  that man a thousand times, and I thought I had. Maybe I really did forgive (原谅) him. So pray (祈祷) for me, and be  52  when you drive again. My son is all I have been left with.”
The man was completely   53  and could not move for the next few minutes. When finally he did, he drove   54 , even a few miles   55  the speed limit, praying for forgiveness.
小题1:
A.truckB.mail carC.police carD.taxi
小题2:
A.excusesB.informationC.adviceD.views
小题3:
A.rememberedB.recognizedC.mistookD.caught
小题4:
A.to schoolB.homeC.outD.to hospital
小题5:
A.wellB.happyC.freeD.healthy
小题6:
A.writingB.looking for C.listingD.looking up
小题7:
A.even B.reallyC.stillD.never
小题8:
A.insuranceB.licenseC.journalD.route
小题9:
A.sentB.handedC.rewardedD.pushed
小题10:
A.paperB.note C.ticketD.notice
小题11:
A.excitedB.upsetC.angryD.surprised
小题12:
A.laughB.smileC.readD.think
小题13:
A.hitB.knockedC.trapped D.killed
小题14:
A.fear B.troubleC.prisonD.danger
小题15:
A.wait B.stay C.remainD.escape
小题16:
A.attackB.forgiveC.educateD.support
小题17:
A.honestB.thankful C.patientD.careful
小题18:
A.disappointedB.nervousC.shockedD.frightened
小题19:
A.quicklyB.slowlyC.fortunatelyD.rapidly
小题20:
A.underB.overC.toD.with