问题
单项选择题
逆行性牙髓炎的感染来源于
A．龋洞
B．隐裂
C．楔状缺损
D．牙周病所致的深牙周袋
E．磨损
答案
参考答案：D
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逆行性牙髓炎的感染来源于
A．龋洞
B．隐裂
C．楔状缺损
D．牙周病所致的深牙周袋
E．磨损
参考答案：D
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| ( ) 1. Where are you going to go? ( ) 2. What are you going to take? ( ) 3. When are you going to get up? ( ) 4. Who's going to go to the airport? ( ) 5. How are you going to get there? | A. By car. B. I am going to England. C. At six o'clock. D. My grandparents. E. I am going to take my book. |