GRE Text Completion: JiJing 1373-GRE填空机经1373题 - M5ID5L4C2HN2270YA

In a federally governed country, a regional government can function as a (i)____________ for the entire nation – a setting in which new ideas under consideration for national implementation are (ii)____________ without having to involve the country as a whole. A. laboratory B. dispersed C. catalyst D. undermined E. standard F. tried