The frequency band used to transmit data in  ADSL2+  is  ____  .

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The frequency band used to transmit data in  ADSL2+  is  ____  .
A . 20KHz  ～ 1MHz
B . 0  ～ 4 KHz
C . 1.1MHz  ～ 2_2MHz
D . 20KHz  ～ 2.2MHz
E . High in  10MHZ

Answer:   D

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