近些年来，我国心理学家正在致力于心理测验的（）研究。
A．本土化
B．数量化
C．引进并修订国外量表
D．大量测验
参考答案：A
组织
An integral part of a blowout preventer that serves as the closing element on an open hole，and whose ends do not fit around the drill pipe but seal against each other and shut off the space below completely is the（）.
A.shear ram
B.blind ram
C.pipe ram
D.annular ram
