题目:
设集合P={3,log2a},Q={a,b},若P∩Q={0},则P∪Q= [ ]
A.{3,0}
B.{3,0,1}
C.{3,0,2}
D.{3,0,1,2}
答案:
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小题1:B小题2:B小题3:D小题4:C小题5:D小题1:理解推断题,纵观全文可知。小题2:细节理解题,由文中语句“In the morning the air is fresh and the mind is clear.”可知小题3:细节理解题,由文中语句...