相關Qab的文學知識

問題詳情：設*P={3,log2a}，Q={a,b}，若P∩Q={0}，則P∪Q=(   )A．{3,0}                    B．{3,0,1}           C．{3,0,2}           D．{3,0,1,2}【回答】B知識點：*與函數的概念題...