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【单选题】

The promising idea mentioned in the first paragraph ______.
A.has mature technology to support it

B.has a stable early application—the Xl0 system
C.is to transmit data by power lines within the house
D.fostered products which affected wireless network
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根据网考网移动考试中心的统计,该试题:

4%的考友选择了A选项

45%的考友选择了B选项

50%的考友选择了C选项

1%的考友选择了D选项

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