急性病毒性肝炎最灵敏的指标是()
A.ALT
B.AST
C.AST/ALT
D.c-AST
E.m-AST
参考答案:A
56. It is impossible for so workers to do so work in a single day.
A.few; much
B.few; many
C.little; much
D.little; many
脐带一般3~7天可自然脱落。