5. The day breaks, _______ the birds are singing.
A.for
B.because
C.since
D.As soon as
A
设集合A={x|x2-3x+2=0},B={x|x2-ax+(a-1)=0},C={x|x2-mx+2=0},若A∪B=A,A∩C=C,
(I)求实数a的取值集合.
(Ⅱ)求实数m的取值集合.
“两学一做”学习教育四次专题讨论的主题是什么?