为了提高直流系统的供电可靠性，变电站直流系统的馈线应采用环状供电方式。
参考答案：错
_____ hungry Iam,I never seem to be able to finish off this load of bread. [ ]
A.Whatever
B.Whenever
C.Wherever
D. However
属于阳的事物和现象是( )
A．心烦不宁
B．脉象沉细
C．声低无力
D．精神萎靡
E．面色晦暗
