试题与答案

_______ after a long walk,Henry called a

题型:选择题

题目:

_______ after a long walk,Henry called and said he couldn't come to the meeting.[ ]

A. Having worn out  

B. Being worn out

C. To wear out  

D. Worn out

答案:

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参考答案:A解析:由于上颌后牙的覆盖过小或缺牙后,颊部软组织向内凹陷,天然牙牙尖锐利都会造成咬颊黏膜,应加大后牙覆盖,调磨过锐的牙尖,加厚基托推开颊肌。咬舌多因下颌后牙排列偏向舌侧或因牙合平面过低造...

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