Which of the following is NOT among the functions of the communications dust according to
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Which of the following is NOT among the functions of the communications dust according to the passage？
A．To monitor light.
B．To change color.
C．To show movies.
D．To play music.
请帮忙给出正确答案和分析，谢谢！
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正确答案：A
细节题。按照文章最后一段末句AndeverylamppostcouldbeontheInternettoo—eachonewithsensorstomonitorlight，pollution，airqualityandtrafficflow，即未来电线杆的功能之一是检测公路上的照明，所以[A]不是通讯粉末的功能，故为正确答案。第二段最后一句提到了通讯粉末的功能：changecolor([B])，playmusic([D])，showmovies([C])orevenspeaktoyou。