To some, this may sound unbelievable. But the technology for such chips is no longer the stuff (东西) of science fiction. And it may soon offer many other benefits besides locating(定位) lost children or elderly patients. It could be used as credit cards and people won’t have to carry wallets anymore.

　　On the other hand, some are already wondering what this sort of technology may do to the sense of personal privacy and liberty.

　　“Any technology of this kind could result in improper use of personal privacy,” says Lee Tien, senior staff attorney for the Electronic Frontier Foundation. “If a kid can be tracked, do you want other people to be able to track your kid? It’s a double-edged sword.”

　　Applied Digital Solutions, Inc. in Palm Beach, Florida, says it has recently applied to the Food and Drug Administration for permission to begin testing its device in humans. About the size of a grain of rice, the microchip can be encoded (编码) with bits of information and embedded in humans under a layer (表层)of skin. When scanned by a nearby reader, the embedded chip gives the data.

　　Most embedded chip designs are so-called passive chips, which give information only when scanned by a nearby reader. But active chips---such as the proposed（被提议）Digital Angel of the future---will give out information all the time. And that means designers will have to develop some sort of power source that can provide a continuous source of energy, yet be small enough to be embedded with the chips.

【2017年高考英语二轮专题复习命题预测91】相关文章：

★ 2013高考英语听力提升素材

★ 2017届高考英语二轮复习课时训练：7（含解析）

★ 盘点高考英语百日冲刺十个方面不能碰

★ 2017届高考英语二轮复习课时训练：13（含解析）

★ 盘点2016年高考英语做好阅读理解的八种能力

★ 2016年高考【英语】学科试题评析（四川卷）

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (82)

★ 高考英语二轮复习经验指导2016年

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (37)

★ 【优化方案】2017届高考英语二轮复习全国卷Ⅱ题型重组训练：第6组（含解析）