A . A、Quidway（config-if-s0）#backup state-down10
B . B、Quidway（config-logic-channel8）#backup state-down10
C . C、Quidway（config-logic-channel8）#backup delay1010
D . D、Quidway（config-int-s0）#backup delay1010
E . E、Quidway（config-int-s0）#backup state-down1010
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