单项选择题
Which of the following is the MOST secure and efficient way to dispose of rewritable DVD media containing sensitive information？（）
A.Media should be erased
B.Media should be shredded
C.Media should be exposed to UV
D.Media should be formatted
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A. Default gateway
B. The ports on the switch
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Whichofthefollowingisthetypicalrecommendedtemperaturerangeforadatacenter？（）
A.64°F to 77°F（18°C to 25°C）
B.78°F to 85°F（26°C to 29°C）
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