学生乙临床检查时发现患者牙釉质半透明度有改变，可见白垩色不透

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问题单项选择题

学生乙临床检查时发现患者牙釉质半透明度有改变，可见白垩色不透明区呈不规则牙面分布，怀疑为氟牙症，复习标准后诊断为

A．正常

B．可疑

C．很轻

D．轻度

E．中度

答案

参考答案：C

填空题

阅读以上信息,完成下面短文,每空限填一词。

Li Xiaoyun is a 22-year-old girl. Her 1 name is Michelle. She is Number One in the Super

Girls of 2009. She is 1.68m tall. She was born in 2 , China, but now she lives in Melbourne,

Australia. She loves singing and 3 to music very much. And also she can play 4 and the

piano. Her favourite colour is blue and 5 .

1. 2. 3. 4. 5.

单项选择题

假性神经递质引起肝性脑病的机制是（）。

A、干扰脑的能量代谢

B、使脑细胞产生抑制性突出后电位

C、干扰脑细胞膜的功能

D、与正常递质竞争受体，但其效应远较正常递质弱