与磁条卡相比，芯片卡具有（）等突出优势。
A.安全性高
B.成本低廉
C.多应用型
D.数据存储容量大
参考答案：A, C, D
---I can’t find Mr. Brown. Where did you meet him this morning?
---It was in the hotel _______he stayed.
A that B which C where D when
磁力探伤后退磁的目的和方法？
