When UPS2000-G shuts down the single machine of the shutdown system, it needs to ().

When UPS2000-G shuts down the single machine of the shutdown system, it needs to ().
A . Perform 2 consecutive shutdown operations on the machine
B . Only one shutdown operation is required for the machine
C . Directly disconnect the input of the machine
D . Shut down all UPSs in the system

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Answer: A