我想问一下另外一道平行问题: some bat caves,like honybee hives, have residents that take on different duties such as defending the entrance, acting as sentinels and to sound a warning at the approach of danger, and scouting outside the cave for new food and roosting sites. B acting as sentinels and sounding D to act as sentinels and to sound -- by 会员 qiqicong (2010/8/3 9:50:34)
我偏向于B选项耶 因为分析了这句话,就是说这个residents take on different duties, 包括4种,defend the entrance,act as sentinels, sound a warning and scout ouside. 逻辑上就是平行的概念,所以形式应该平行,请斧正! |