充填术后出现冷热痛,其原因可能()
A.术前牙髓活力判断不准确
B.深龋未垫底
C.制洞过程中产热过多
D.充填物过高
E.洞形制备不良
参考答案:A, B, C
I_______ on the summer holiday. [ ]
A. have a great time
B. has a good time
C. had a good time
D. had great time
※ [31~34]. ( 4 )
: : ________________________
A. .
B. .
C.
D.