单选题A user reports that their UPS is making a loud beeping sound. Which of the following would cause this problem?（）AThe UPS is overcharged.BIncorrect wattage on the power supply.CThe UPS battery is not charged.DThe UPS is in power management mode.
单选题
A user reports that their UPS is making a loud beeping sound. Which of the following would cause this problem?（）
A
The UPS is overcharged.
B
Incorrect wattage on the power supply.
C
The UPS battery is not charged.
D
The UPS is in power management mode.
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