题目 / 答案提交正确答案
Imagine the offline moment in your life, suppose you go for groceries in a supermarket, buy a snack in street shops, eat at some restaurants, go to watch a movie, or take a subway, you just scan their （） on their wall or at the cashier, the mobile pay page would automatically pop up created by those mobile payment apps.
A.QR code
B.money
C.card
D.bill
正确答案：A
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