问题 单项选择题

以下哪种病变X线片表现为根尖周圆形低密度透射区,边缘有一薄层密质白线()

A.急性根尖周炎

B.慢性根尖脓肿

C.根尖肉芽肿

D.根尖囊肿

E.牙骨质增生

答案

参考答案:D

写作题

书面表达。(共1题;满分10分)

假如你是Mary,请根据提示,适当发挥想像力,给出差在外的爸爸妈妈写一封70词左右的邮件,告诉他们弟弟Tony昨天晚上不仅不按时睡觉,而且玩得很晚。 邮件的开头、结尾已给出,不计入总词数。

提示: 1. drew pictures 

2. played in the bath room

3. asked Mary to play with him

4. sang songs on the bed

Dear Mom and Dad,

Last night                                                                  

                                                                          

                                                                          

                                                                          

                                                                          

                                                                          

                                                                          

                                                                          

                                                                          

                                                                

I miss you!

Yours,

Mary

单项选择题