患者男,32岁,缺失,伸长,牙合龈间隙3mm,哪种处理较恰当()。
A.义齿用铸造金属面
B.义齿面和支托整铸
C.义齿支架和支托整铸
D.牙髓切除后磨改
E.不修复
参考答案:B
Why have they sent me this bill? I _____ it several weeks ago. [ ]
A. pay
B. have paid
C. was paying
D. paid
支气管哮喘发作时常出现()
A.进行性呼吸困难
B.吸气性呼吸困难
C.夜间阵发性呼吸困难
D.呼气性呼吸困难
E.混合性呼吸困难