患者右上第一中切牙扭转近90度，且伴有唇侧倾斜，牙髓正常，牙根_爱下问搜题

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问题单项选择题

患者右上第一中切牙扭转近90度，且伴有唇侧倾斜，牙髓正常，牙根长大，牙槽骨轻度吸收，牙龈红肿，探易出血。

修复开始前要做的准备工作，不必要的是

A．牙周洁治

B．X线牙片

C．根管治疗

D．与患者讲明治疗方案

E．曲面断层像

答案

参考答案：E

解析：此患牙不涉及其他的牙齿只拍牙片即可，不必拍曲面断层像。

阅读理解

							Everyone wants to stay healthy, and they usually have different ways. Some people do exercise every day, and others keep a balanced diet. As for me, I choose(选择)the latter. I'm daydaytest Placeholder! The most important reason for keeping a balanced diet is that it can give you all the nutrition (营养)your body needs. You should change your diet every other day and it should have rice, meat, vegetables, fruit, milk and so on. That's because these foods will help you stay in good health. The second reason for keeping a balanced diet is that it won't take you much time to do it. Finally, you can enjoy different kinds of delicious food and keep healthy at the same time. So I think the best way to stay healthy is to keep a balanced diet, which will also lead to a happy life.

							1. To stay healthy, the writer chooses to ________.
							A. do exercise every day B. enjoy delicious food C. keep a balanced diet
							2. Different kinds of _______ will help you stay in good health.
							A. exercises B. food C. lifestyles
							3. It will take you ______ time to keep a balanced diet.
							A. a little B. lots of C. little
							4. The best title of the passage should be "______".
							A. Having good living habits B. The best way to stay healthy C. How to keep healthy

单项选择题

老年人体内免疫系统变化的特点是（）。

A.免疫功能下降

B.免疫功能亢进

C.免疫功能基本不变

D.免疫功能下降，免疫异常增强

E.免疫异常增强