题目内容

材料消耗预算定额是按平均先进的生产水平制订的材料消耗标准。()

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WhichtwostatementsaretrueaboutBPDUport-guardandBPDUfiltering?()

A. BPDUport-guardcanbeenabledglobally,whereasBPDUfilteringmustbeenabledonaper-interfacebasis.
B. Whengloballyenabled,BPDUport-guardandBPDUfilteringapplyonlytoPortFastenabledports.
C. Whengloballyenabled,BPDUport-guardandBPDUfilteringapplyonlytotrunking-enabledports.
D. WhenaBPDUisreceivedonaBPDUport-guardenabledport,theinterfacegoesintotheerr-disabledstate.
E. WhenaBPDUisreceivedonaBPDUfilteringenabledport,theinterfacegoesintotheerr-disabledstate.
F. WhenaBPDUisreceivedonaBPDUfilteringenabledport,theinterfacegoesintotheSTPblockingstate.

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