在轴两端的支撑点，用轴承盖单向固定轴承，分别限制两个方向的（）。
A.径向移动
B.径向转动
C.轴向移动
D.轴向转动
参考答案：C
—So what is the procedure?
—All the applicants ________ before a final decision is made by the authority.(2013·北京，32)
A．interview
B．are interviewing
C．are interviewed
D．are being interviewed
研磨时，研具的硬度（）工件硬度。
A.高于
B.低于
C.等于
D.不确定
