2009B mcm 提示
Thisquestioninvolvesthe“energy”consequencesofthecellphonerevolution.Cellphoneusageismushrooming,andmanypeopleareusingcellphonesandgivinguptheirlandlinetelephones.Whatistheconsequenceofthisintermsofelectricityuse?Everycellphonecomeswithabatteryandarecharger.
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