题目内容

2.Mobile phone users will be able to charge(充电) their devices wirelessly for the first time from 2015.
Fujitsu,the Japanese technology company,has created a system capable of charging quite a few portable electronic devices in the meanwhile,such as mobile phones,digital cameras and laptop computers without the need for cable connections.Electric cars users may also eventually be able to charge their vehicles wirelessly using the same technology according to Fujitsu,which presented a system at an Institute of Electronics,Information and Communication Engineers Conference at Osaka Prefecture University.
Claiming to be the world's first of its kind,the technology works on the basis of the transmission of electricity using magnetic fields between the charger and the electronic device.The system enables wireless charging at distances of up to several metres,with the final aim of installing public"charging spots"on the streets in order to enable easy charging around the clock.
Scientists at Fujitsu Laboratories are planning to commercially sell products including the new wireless charging system as early as 2012but did not make it clear how much they would cost."This technology makes it possible to add compact wireless charging functions into mobile phones and enabling several portable devices to be charged at the same time without any restrictions(限制)on their position in association with the charger,"the company said in a statement.
The growing popularity of portable electronic devices ranging from iPads to e-readers is expected to fuel a boom in wireless recharging technology developments over the coming decade.
Mobile phone users in Japan can currently fill up their batteries using disposable(一次性的)portable plug-in battery-operated devices--available at most train stations and convenience stores--although phone companies warn any use for too long can damage the phones.
The new system displayed by Fujitsu,however,is significantly advanced and represents the next generation of portable recharging systems using highly tuned wireless technology.The company added,"We are also looking at applying the results of this work to fields other than portable electronics,including power transmission between circuit boards or computer chips,and providing mobile charging systems for electric cars."
68.The writer's purpose of writing the passage isD.
A.to analyze the current international situation
B.to warn people against using disposable portable plug-in battery-operated devices
C.to encourage customers to purchase the new charging devices
D.to introduce a new technology applied to charging wirelessly
69.According to the new technology,electricity can be transmitted byA.
A.using magnetic fields
B.using the electronic devices
C.using batteries
D.using disposable portable plug-in battery-operated devices
70.What is certain according to the passage is thatC.
A.the charging system can serve one portable electronic device at a time
B.all the convenience stores in Japan can provide the charging service now
C.wireless charging works within a distance of up to several metres
D.the new product doesn't look promising.

分析 本文主要介绍日本富士通实验室的研究人员开发了一种无线充电系统,可同时给一定范围内的手机、数码相机及手提电脑等各种移动设备充电,无需使用电缆.

解答 68-70 DAC
68.D 主旨大意题.根据第二段Fujitsu,the Japanese technology company,has created a system capable of charging quite a few portable electronic devices in the meanwhile,such as mobile phones,digital cameras and laptop computers without the need for cable connections可知,日本富士通实验室的研究人员开发了一种无线充电系统,可同时给一定范围内的手机、数码相机及手提电脑等各种移动设备充电,无需使用电缆.故选D.
69.A 细节理解题.根据第三段Claiming to be the world's first of its kind,the technology works on the basis of the transmission of electricity using magnetic fields between the charger and the electronic device可知,该系统被认为是世界上首个无线充电系统,其工作原理是利用充电器和电子设备之间的磁场来传输电能.故选A.
70.C 细节理解题.根据第三段The system enables wireless charging at distances of up to several metres,with the final aim of installing public"charging spots"on the streets in order to enable easy charging around the clock可知,实现无线充电的范围最远能达到数米,在街道上安装充电点可日夜充电.故选C.

点评 高考中选用的科技文往往反映的是当今人类最先进的科技水平和最新的科研成果.我们阅读它的过程其实就是学习科学知识,掌握科技信息的过程.然后,理解文章,分析文章,以阅读材料所提供的科学事实为依据,同时得出的结论还应符合基本的科普常识,在细心对照基础上,经过一番分析、综合,然后就要根据题目要求对选项作出正确判断了,这些判断包括选项的表达是否符合原文的意思,对概念,文句的理解是否正确,对要点归纳是否全面等,从而排除错误选项,选择最合适的答案.

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