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单选题
Which of the following operates in the 2.4GHz range and has a MAXIMUM distance of 10 meters (33 feet)?（）
A
x-10
B
Bluetooth
C
802.11a
D
802.11b
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单选题Which of the following operates in the 2.4GHz range and has a MAXIMUM distance of 10 meters (33 feet)?（）A
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