30岁女性患者,右上4残冠,已行根管治疗。
在修复体的设计和选择时主要应考虑()
A.牙体剩余量
B.牙周健康状况
C.美观要求
D.咬合关系
E.以上均是
参考答案:E
— Do you know where the headmaster is? I have something urgent.
— Oh, he ____ have gone far, for the computer is still on in the office.
[ ]
A. won't
B. mustn't
C. can't
D. wouldn't
SQL2000中的数据库对象有