複選題
31.(AB) Hitler, for example, is claimed to have been a victim of bullying in his childhood.
(AC) Campus bullying is becoming a serious problem in some high schools in big cities.
(AD) The friends and classmates of the bully and the victim may accept the violence as normal.
(AE) Research indicates that bullying may form a chain reaction and the victim often becomes the bully.
(BC) Psychologists have been puzzled by the inactivity of crowds and bystanders in urban centers when crimes occur in crowded places.
(BD) The link between bullying and school violence has attracted increasing attention since the 1999 tragedy at a Colorado high school.