问题 补全对话，情景问答 给下列的问句选择合适的答语。( ) 1. What's the matter?( ) 2. What are they doing?( ) 3. Where is Lynn?( ) 4. How old are you?( ) 5. This gift is for you.A. I don't know.B. I'm thirty-two years old.C. Thanks. How nice!D. My finger hurts.E. They are working. 答案 1. D 2. E 3. A 4. B 5. C
缺失，
为基牙做单端固定桥，此类修复一般不适用于（）