以下哪项可能产生继发性创伤牙合（）
A.修复
B.牙周病
C.充填
D.正畸
E.调牙合
参考答案：B
The young dancers looked so charming in their beautiful clothes that we took__________ pictures of
them. [ ]
A. many of
B. a great many
C. the number of
D. a large amount of
调取横河DX1006-1-4-3无纸记录仪参数时应采用（）调取。
A、U盘
B、3.5英寸软盘
C、CF卡
D、移动硬盘
