.The _________ look on his face suggested that he hadn’t expected _________ would happen.

A．surprised;what

B．surprising;what

C．surprised;that

D．surprising;that

孔与轴的公差相互交叠，配合时可能产生间隙也可能产生过盈的配合叫（）。

A、过渡配合

B、过盈配合

C、间隙配合

D、普通配合