听力原文：A smart card is a secure, portable, tamper-resistant data-storage device.(6)A．Smart card is light but can resist shock.B．Smart card is convenient, safe and durable.C．Smart card is the exact size of a credit card.D．Smart card contains a computer with
题目
听力原文：A smart card is a secure, portable, tamper-resistant data-storage device.
(6)
A．Smart card is light but can resist shock.
B．Smart card is convenient, safe and durable.
C．Smart card is the exact size of a credit card.
D．Smart card contains a computer with as much power as the original minicomputer.