集合A={(x,y)|2x+y-2=0},B={(x,y)|(2x+y-3)(x+ay-1)=0},若A包含于B,则a=

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集合A={(x,y)|2x+y-2=0},B={(x,y)|(2x+y-3)(x+ay-1)=0},若A包含于B,则a=集合A={(x,y)|2x+y-2=0},B={(x,y)|(2x+y-3)(x

集合A={(x,y)|2x+y-2=0},B={(x,y)|(2x+y-3)(x+ay-1)=0},若A包含于B,则a=
集合A={(x,y)|2x+y-2=0},B={(x,y)|(2x+y-3)(x+ay-1)=0},若A包含于B,则a=

集合A={(x,y)|2x+y-2=0},B={(x,y)|(2x+y-3)(x+ay-1)=0},若A包含于B,则a=
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