The heroine of the story found herself ________ for this married man who had consistently been after her.

A．to fall

B．falling

C．fell

D．fallen

氧自由基的主要作用是（）

A.引起发热

B.起趋化作用

C.使血管通透性升高

D.导致疼痛

E.加重组织损伤