在牙本质粘结过程中应用底胶的作用是() A.使疏水的牙本质表面变成亲水的,有利于粘结

题型:单项选择题

问题:

在牙本质粘结过程中应用底胶的作用是()

A.使疏水的牙本质表面变成亲水的,有利于粘结剂有效地湿润和渗入暴露的胶原纤维微孔中;引导疏水性的粘结树脂进入脱矿的牙本质层;稳定混合层,形成树脂突

B.使亲水的牙本质表面变成疏水的,有利于粘结剂有效地湿润和渗入暴露的胶原纤维微孔中;引导疏水性的粘结树脂进入脱矿的牙本质层;稳定混合层,形成树脂突

C.使亲水的牙本质表面变成疏水的,有利于粘结剂有效地湿润和渗入暴露的胶原纤维微孔中;引导亲水性的粘结树脂进入脱矿的牙本质层;稳定混合层,形成树脂突

D.使疏水的牙本质表面变成亲水的,有利于粘结剂有效地湿润和渗入暴露的胶原纤维微孔中;引导亲水性的粘结树脂进入脱矿的牙本质层;稳定混合层,形成树脂突

E.以上均不是

考点:广东住院医师广东住院医师口腔医学广东住院医师口腔医学模拟试卷(三)
题型:单项选择题

There was a robbery at City Central Bank last yesterday afternoon. Two men entered the bank at about 4 p.m. and told the bank teller on duty to give them $ 1,000,000. The robbers were carrying guns(枪) and wearing black masks(面具) to cover their faces. The robbers told all the customers (顾客)in the bank to lie down on the floor. Witnesses (证人)said that everyone in the bank was very frightened and did what the robbers told them.

The teller agreed to give them the money but told them they’d have to wait a few minutes. She said the bank manager would have to get the money out of the safety. As the robbers were waiting for the money. the teller tried to press an alarm button(按警报按钮) that was hidden under the counter. It was a silent alarm, so the robbers didn’t realize it had been set off.

Just as the manager arrived with the money, ten police officers entered the bank. The robbers were very surprised that the officers caught them easily. The robbers are now in custody(拘留) , and will appear in court next week.

Police congratulated Miss Alston , the bank teller , on brave act. The bank manager said that he would give Miss Alston a week’s vacation to thank her.

小题1:Everyone in the bank did what the robbers told them because _________.

A.they were frightened

B.the robbers were very polite

C.the bank manager told them to

D.they knew the police were coming小题2:The bank teller said the money was __________.

A.under the counter

B.on the floor

C.in custody

D.in the safety小题3:What did the bank teller do ?

A.She telephoned the police

B.She didn’t want to give the money to the robbers

C.She got the money out of the safe.

D.She pressed an alarm button.小题4:The police caught the robbers so easily because the robbers didn’t ________

A.know who the police officers were

B.get the money

C.expect the police arrived at the bank so quickly

D.expect the money to be in the safe

题型:单项选择题

设集合U={x∈N|0≤x≤8},S={1,2,4,5},T={3,5,7},则S∩(CUT)=______.

题型:单项选择题

圣经中先知书,共有多少卷?大先知书有几卷?分别是?小先知书共有多少卷?

题型:单项选择题

如何计算一组测量值的相对标准偏差(变异系数)?

题型:单项选择题

药事管理的目标是通过检验来实现保证药品质量和人体用药的安全、有效、合理。()

更多题库