浮动镗刀镗孔加工质量好，易于控制，广泛应用在生产上，它不仅能镗削整圆的通孔，还能镗削不通孔、阶梯孔和不完整圆的孔。
参考答案：错
—Shenzhen is really a good place. I have a good time here.
—Why not stay here for________two days?
A．other
B．others
C．another
D．the other
无牙颌的分区不包括
A．缓冲区B．主承托区C．后堤区D．副承托区E．边缘封闭区
