已知全集U={1,2,3,4,5,6},集合A={1,2,5},CUB={4,5,6},则集合A∩B=[ ]
A.{5}
B.{1,2}
C.{1,2,3}
D.{3,4,6}
答案:B
He is Tom Hand.His __________ is Tom.
A.first name
B.family name
C.last name
D.school name
NBT还原试验可用于吞噬细胞免疫缺陷病的检查,其正常值范围一般为( )
A.>15%B.<5%C.>20%D.<10%E.>10%