患者女，70岁，全牙列缺失，上颌弓偏小，牙槽嵴低平，下颌弓大，牙槽嵴较丰满，下颌弓明显突出于上颌弓之前

采取后牙互换法排反时，为保持上下后牙的协调关系应考虑（）

A.上颌两侧各增加一个前磨牙，下后牙不变

B.下颌两侧各减去一个前磨牙，上后牙不变

C.上颌两侧各减去一个前磨牙，下后牙不变

D.用小号上后牙，大号下后牙

E.后牙保持不变

Project Quality Management must address the management of the project and the（）of the project. While Project Quality Management applies to all projects, regardless of the nature of their product, product quality measures and techniques are specific to the particular type of product produced by the project.

A．performance

B．process

C．product

D．object