单项选择题
Which of the following needs to be recycled due to dangerous amounts of gas contained inside its housing？（）
A.CRT
B.Toner
C.Surge suppressor
D.LCD
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Auserreportsthattheircellphonebatteryisdeadandcannotholdacharge.Whichofthefollowingshouldbedonewhendisposingoftheoldbattery？（）
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Whichofthefollowingistherecommendeddisposalmethodforusedcomputers？（）
A.Trash can
B.Burial
C.Recycling center
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