问题
单项选择题 A3/A4型题
患者，女性，61岁，因自觉左上前牙逐渐变色前来就诊，无疼痛肿胀不适，否认外伤病史。临床检查见
切端较深的倒V字形缺损，牙冠呈暗黄色，失去光泽，唇面釉质多处纵行裂纹，无松动，无叩痛，牙龈无肿胀无瘘管。
造成该病变最不可能的原因是（）
A.饮食
B.不良习惯
C.外伤
D.正畸治疗
E.酸蚀症
答案
参考答案：E
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患者，女性，61岁，因自觉左上前牙逐渐变色前来就诊，无疼痛肿胀不适，否认外伤病史。临床检查见切端较深的倒V字形缺损，牙冠呈暗黄色，失去光泽，唇面釉质多处纵行裂纹，无松动，无叩痛，牙龈无肿胀无瘘管。
造成该病变最不可能的原因是（）
A.饮食
B.不良习惯
C.外伤
D.正畸治疗
E.酸蚀症
参考答案：E
| 根据句子意思，从方框中选用恰当的单词或短语填空。 | |
2. I don't know how many _______ the dog has. 3. The young woman at the gate looks __________ in a red dress. 4. Daniel didn't go to school yesterday because it __________ heavily. 5. This book __________ Simon. I'll give it back to him at once. 6. It's very kind _______ you. Thank you for your wonderful present. 7. The children clapped and shouted _____ when they saw their favorite characters. 8. Please _________ at the second crossing, and you will find the library on your left. |