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 cr

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问题  
A smart card is a secure, portable, tamper-resistant data-storage device.

选项 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.

答案B

解析 单句意思为“智能卡是一种安全、便携且防损的数据存储工具”。A、C、D三项内容在录音单句中并未提及。
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