右心衰竭的临床表现是
A.心博出量减少
B.体循环静脉瘀血及水肿
C.毛细血管通透性增高
D.容量血管收缩使使静脉压增高
E.醛固酮增高使血容量增加
参考答案:B
It was obvious that the Climate Change Conference in Copenhagen became the __________ of
media attention.[ ]
A. discovery
B. focus
C. summary
D. comment
行政首长负责制的优点是( )。
A.体现民主决策
B.减少扯皮现象
C.防止权力滥用
D.有利于集思广益