Which of the following types of access control seeks to discover evidence of unwanted，unau-thorized，or illicit behavior or activity？（）

Brazil′s Amazon rainforest is（）with life that could yie...

单项选择题Brazil′s Amazon rainforest is（）with life that could yield raw materials for new medicines.

Though outwardly（）the speaker was actually quite distur...

单项选择题Though outwardly（）the speaker was actually quite disturbed by the tumultuous crowd.

Because his occupation requires that he work at night a...

单项选择题Because his occupation requires that he work at night and sleep during the day，he had an exceptionally（）face.