牙体缺损修复后如因继发龋等而发生牙髓炎时会出现（）
A.过敏性痛
B.自发性痛
C.咬合痛
D.龈炎
E.修复体松动
参考答案：B
属于纤维型胶原的是（）。
A.Ⅰ型胶原
B.Ⅶ型胶原
C.Ⅹ型胶原
D.Ⅻ型胶原
E.Ⅵ型胶原
Mrs. Brown is nice. Every day she tried to cook__________ for me during my stay in Canada.
A. something different
B. anything different
C. nothing different
