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(2004•嘉兴)计算:÷(1-)的正确结果是A.a+1B.1C.a-1D.-1
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(2004•嘉兴)计算:
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABsAAAAjCAYAAABl/XGVAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAD5SURBVEhL7ZWLDYQgDIY7GTuxDsswCqP0qNwJ
nhXbq49IzkhMfPSjf/9awAsPuJCFN8FSQAcOQzov15JZ9AgAeV0BK0T0T4FFT8rQ8hhJKR9X9WgM
ss6sBvgEaq5zsITBAbq52BQHkGG1bvxNRtpQBVEyBOdr381s15fkYBdy+Obg7r0fm2ApOCar70zr
RkywpYSlVqV9EuZzwyBTQ9fic8VlJV18l104tc92v970u9p1g/2FgTMrv5jzFxVhYBntHpNH+Mso
16rzpkpGyTTu7UoIk09jM0wzjW0w5TQ2wbTT2ATTTmMTDJXT2AY7pMNKEKH1jyGOC3sB+UmzE0eN
CEIAAAAASUVORK5CYII=
)
÷(1-
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAjCAYAAACgj+sEAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACxSURBVDhP7VSJDcMwCGQydmIdlmEURrkaO0/d
kDSW0lSqimJFSnjOcBxh0GjQHxcEuIKJoZ7X7iuYgIjKORtQkxrkH9C3NxncSJfq0GIO7Yhth3cB
Nd6w8YYK8wXPvAPtDZC+sKIfnYPJzCOBxX4nZJra6lAm8CIVwdgD8kXm1TkuEQly5SAEpVmLy5Nl
36bf5MpJ9teKazLq4TTsTcgc5dlYg7RsWelOFbJ99fsF8j0AdKID/VGvdmEAAAAASUVORK5CYII=
)
)的正确结果是( )
A.a+1
B.1
C.a-1
D.-1
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