单项选择题
What can contribute to the unnecessary power consumption caused by computers?
A.screensavers B.phantom power
C.standby and sleep modes D.power-management tools
A.screensavers
B.phantom
C.standby
D.power-management
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单项选择题
To reduce power consumption of your computer, the following methods are recommended by the author except ______. A.setting the computer to go to sleep after periods of inactivity B.shutting it down at night when power is most expensive C.setting different parts of the computer to sleep at different times D.setting the hard drive to sleep after 30 minutes of inactivity
A.
B.setting
C.shutting
D.setting
E.setting
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单项选择题
To reduce the computers environmental footprint, you should learn how to ______. A.run your PC more efficiently B.dispose of an old computer properly C.make environmentally-intelligent purchasing decisions D.All of the above.
A.
B.run
C.dispose
D.make
E.All
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