病损呈弥漫型,累及大多数牙多见于( )
A.单纯性牙周炎 B.咬合创伤 C.快速进展性牙周炎 D.青春前期牙周炎 E.青少年牙周炎
参考答案:C
________ a baseball? [ ]
A. Are you have
B. Do you have
C. Are you
D. Do you are have
事故具有不确定性、因果相关性、危害性、公共性等特征。