Since 1980s， people have studied how to improve the information（）of barcode symbol.
Since 1980s， people have studied how to improve the information（）of barcode symbol.
A、amount
B、density
C、number
D、crowdedness
正确答案：density
★《布宫号》提醒您：民俗信仰仅供参考，请勿过度迷信！
本文经用户投稿或网站收集转载，如有侵权请联系本站。