It said the country's confirmed H7N9 cases were isolated and there has been no______ of human-to-human transmission.

A．mark

B．symbol

C．sign

D．signal

县级农村合作金融机构审计委员会对谁负责。（）

A.社员代表大会

B.理（董）事会

C.监事会

D.县级农村合作（商业）金融机构管理层