龈沟底在釉牙骨质界的根方，同时龈沟深度超过多少称为牙周袋
A．2mm
B．2．5mm
C．3mm
D．4mm
E．6mm
参考答案：C
填动物名称，补充成语。
群( )无首 调( )离山 盲人摸( )
胆小如( ) ( )飞( )舞 照( )画( )
( )腾( )跃 ( )头( )尾 ( )假( )威
_______ you do it, you’d better do it well.
A. Now that B After C. Although D. As soon as
