题目链接:http://exam.upc.edu.cn/problem.php?id=5561题目:题目描述In a 10-dollar shop, everything is worthy 10 dollars or less. In order to serve customers more effectively at the cashier, change needs to be p...
题目链接:http://exam.upc.edu.cn/problem.php?id=5559题目:题目描述5G is the proposed next telecommunications standards beyond the current 4G standards. 5G planning aims at higher capacity than current 4G, allo...