Totally _____ accident, the businessman got hold of a ten-pound fake banknote that was believed to ______ two hundred years ago.

A．by; have been issued

B．with; have come into use

C．in; have come out

D．at; have come into being

既具有收敛止血，又具有化瘀止血作用的药物是( )

A．白及

B．血余炭

C．侧柏叶

D．藕节