选出不属于同一类的单词。
____ A. hard B. soft C. bike
____ A. car B. cat C. bus
____ A. colour B. brown C. white
____ A. can B. hear C. see
____ A. what B. is C. are
公交车上安装有“电视监控器”,该装置的光学系统是____(填“凸透镜”或“凹透镜”),“电视监控器”的摄像头能成____(选填“正立”或“倒立”)、____(选填“放大”或“缩小”)的实像.