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直线ax+2y1=0与x+(a1)y+2=0平行,则a等于
A. B.2 C.1 D.2或1
直线x+ay+6=0与直线(a-2)x+3y+2a=0平行,则a的值等于
A.-1或3
B.1或3
C.-3
D.-1
直线
[
A
B
C
D
直线ax+2y+2=0与直线3x-y-2=0平行,则a等于
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