金属全冠戴用2天后,咀嚼时修复牙出现咬合痛,检查有明显叩痛,其原因是()
A.牙髓炎
B.牙周炎
C.咬合时有早接触点
D.牙龈炎
E.接触点过松
参考答案:C
— Can you lend me the book Gone with the Wind?
— Sorry. I returned it to the library just now. Maybe it is still ____.
A.available
B.affordable
C.acceptable
D.valuable
四级工业动火方案由哪级负责进行审批、监督检查?