.

_____the wind and waves we were going in the direction of the whirlpool,and nothing could save us.

A．By

B．At

C．To

D．With

当中毒原因不明时，外因分类按下列哪种情况编码（）.

A.意图不确定的中毒

B.假定他人加害的中毒

C.假定自杀性中毒

D.假定意外中毒

E.无法编码