The U.S. official said North Korea --- and Iran --- should follow in the steps of Libya, which last December said it would work__________ to allow international weapons inspectors to do their work.

A．unconditionally

B．unwillingly

C．unfortunately

D．uncomfortably

非特异感觉投射系统的主要功能是

A．参与学习与记忆机制
B．参与睡眠形成机制
C．维持和改变大脑皮层的兴奋状态
D．协调各种感觉在皮层与皮层下结构间的联系
E．引起特定感觉并激发大脑皮质的传出活动