试题与答案

乳牙常会产生的沿牙颈部环绕牙冠的龋蚀称() A.奶瓶龋 B.猛性龋 C.干性龋 D.

题型:单项选择题

题目:

乳牙常会产生的沿牙颈部环绕牙冠的龋蚀称()

A.奶瓶龋

B.猛性龋

C.干性龋

D.湿性龋

E.环状龋

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B解析:肺动-静脉样分流:由于肺部病变如肺泡萎陷、肺不张、肺水肿和肺炎实变均可引起肺动脉样分流增加,使静脉血没有接触肺泡气进行气体交换的机会。因此,提高吸氧浓度并不能提高动脉血氧分压。分流...

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A.3.25

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