A:a, respects and hel
B:/, his respects and hel
C:the, respect and honor
D:/, thanks and hel
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已知点M(a,b)(a>0,b>0)是圆C:x2+y2=1内任意一点,点P(x,y)是圆上任意一点,则ax+by﹣1的值( )