肝硬化失代偿期肝功能减退的表现有：（）
A.腹水
B.黄疸
C.出血倾向及贫血
D.内分泌失调及神经精神症状
E.营养不良
参考答案：B, C, D, E
____， he never seems able to do the work beautifully.
A．Try as he does
B．As he tries
C．Try as does he
D．As try he does
简述成本加和法及其应用的现实性和局限性。
