Against this deteriorating global background, the improvement in economic performance in a few developing regions in 1991 was especially noteworthy. ( )

A．determinating

B．tolerating

C．improving

D．worsening

仲裁庭评议案件，实行( )原则。

A．民主集中制

B．首长负责制

C．少数服从多数

D．合议制