A:of which
B:with which
C:about which
D:into which
息:①去以六月息者也____
②生物之以息相吹也____
为:①其名为鲲____
②化而为鸟____
之:①鹏之背,不知其几千里也____
②鹏之徙于南冥也____
其:①其名为鹏____
②其视下也____
③其正色邪____
而:①化而为鸟____
②怒而飞____
下列句子中语言表达最得体的一项是( )
已知集合A={-5,-3,0,3,5},集合B={-5,-2,2,5},则A∪B= ( )