对于夹紧力针对工件支承面情况，可采用辅助支承，以减小变形是为了消除（）误差。
A.传动链
B.调整
C.理论
D.装夹
参考答案：D
Great changes have taken place in the school. It is no longer the school______ it was 30 years
ago, ________ it was so poorly equipped. [ ]
A. that; when
B. that; which
C. what; when
D. which; that
在处理已识别的风险及其根源时，（）用来检查并记录风险应对策略的效果以及风险管理过程的效果。
A.风险再评估
B.风险审计
C.预留管理
D.偏差和趋势分析
