问题
单项选择题 A1/A2型题
患者，男，75岁，全口义齿初戴，义齿在静止状态下容易脱落，主要原因可能是（）
A.基托边缘伸展不够，边缘封闭不好
B.唇、颊、舌系带区基托边缘缓冲不够
C.人工牙排列的位置不当
D.人工牙咬合不平衡
E.以上均是
答案
参考答案：A
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患者，男，75岁，全口义齿初戴，义齿在静止状态下容易脱落，主要原因可能是（）
A.基托边缘伸展不够，边缘封闭不好
B.唇、颊、舌系带区基托边缘缓冲不够
C.人工牙排列的位置不当
D.人工牙咬合不平衡
E.以上均是
参考答案：A
| 完形填空。 | ||||
| Sheepdogs are very important to farmers. Sheepdogs help farmers to find their 1 and bring them back to the farm. Mike, a farmer from a 2 , has a very clever and honest sheepdog 3 Bobby. He has built a little but 4 house for Bobby and he regards the dog 5 a family member. He often says. "Bobby is the best dog in the world. He works hard and 6 my sheep very well." If the dog house is 7 . Mike knows Bobby must be with his sheep. Mike 8 with Bobby through whistles (口哨). Bobby can understand many different instructions from those 9 . And Bobby can also 10 himself by barking (狗叫) or doing other actions. Mike loves Bobby very much. They are getting on well with each other. | ||||
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