问题
单项选择题 A1/A2型题
关于RPA卡环，下列描述中错误的是（）。
A.常用于远中游离端义齿
B.基牙下存在有软组织倒凹
C.口腔前庭深度不足
D.卡环臂的坚硬部分位于观测线上方
E.卡环臂坚硬部分与观测线上缘接触
答案
参考答案：D
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关于RPA卡环，下列描述中错误的是（）。
A.常用于远中游离端义齿
B.基牙下存在有软组织倒凹
C.口腔前庭深度不足
D.卡环臂的坚硬部分位于观测线上方
E.卡环臂坚硬部分与观测线上缘接触
参考答案：D
| 读一读，补全短文。 | |
to the window. I saw houses, parks, and swimming pools on the ground. They were all very small! I 2. the food on the airplane. I 3. chicken, rice, icecream and a candy bar. I drank orange juice. I 4. TV too. I 5. it a lot. My aunt met me at the airport and we got home very late. I was very 6. and I had a dream that night. In my dream I 7. on a trip again. |