A:依法行政,强化管理
B:严控编制,提高效率
C:强化责任,转变职能
D:加强监督,转变作风
The boy sat there for a long time without(没有)doing ______ after he finished his homework.
用显微镜观察时,如果转动目镜和物镜都未能把视野中的污点移走,那么可以断定污点在( )