ElectricBackpack
Backpacks are convenient. They can hold your books,your lunch,and achange of clothes,leaving your hands free to do other things.Someday,if youdont mind carrying a heavy load,your backpacks might also power your MP31player,keep your cell phone running,and maybe even light your wayhome.
The backpacks electricity-creating powers depend onsprings used to hang a cloth pack from its metal frame.The frame sits againstthe wearers back,and the whole pack moves up and down as the person walks.Agear mechanism converts vertical movements of the pack to rotary motions of anelectrical generator,producing up to 7.4 watts.
The backpack could be especially useful forsoldiers,scientists,mountaineers,and emergency workers who typically carryheavy backpacks.For the rest of us,power-generating backpacks could make itpossible to walk,play video games,watch TV,and listen to music,all at the sametime.Electricity-generating packs arent on the market yet,but if you do get one eventually,just make sure to look both ways before crossing thestreet!
backpackn.背包 wattn.瓦
night-visiongoggle 夜视镜 oscillationn.摆动
verticaladj.垂直的 mountaineern.登山运动员5rEutEri p
练习:
A they can be verylarge.
C your handsare freed to do other things.
What is the most important feature of the backpack invented byLawrence C.Rome
A It produces electricity forelectronic devices while the wearer walks.
C It is small andconvenient.
The word springs inParagraph 3 means
B the season of the year,occurring between winter and summer.
D a length of metal woundaround,which returns to its original shape after
According to Paragraph 4,what does Rome plan to do?
B To put the backpack on the market.
D To promote the backpack in anewspaper or on television.
ways before crossing the street!?
B Enjoyingelectronic devices while walking may invite traffic accidents.
D It is wise of you to have such abackpack.
C第一段告诉我们,因为背包可以装许多东西,所以可以将双手解放出来做其他事情:tofree your hands to do other things。
D springs在此是弹簧的意思。spring是一个多义词:泉水、春天、弹跳。
B这个句子的字面意思是:如果你终于得到这样的背包,过马路时一定要两面都看看。也就是说,不要因为同时玩着游戏,听着音乐、看着电视,太专注以致不注意来往车辆了
2018伦敦时装周宣布不使用皮草!时尚也环保了...
国内英语资讯:Xi congratulates Nguyen Phu Trong on election as Vietnamese president
国内英语资讯:Xi sends condolences to Nguyen Phu Trong over passing away of Vietnamese president
国际英语资讯:Zambia, Zimbabwe seal 4 cooperation deals
川普要向全美手机发送警报!根本无法取消...
国际英语资讯:Portuguese protests against eviction, rising rents
国内英语资讯:Lawmakers deliberate draft international criminal judicial assistance law
个子矮,所以减肥更困难?
美中贸易战之际,日相安倍晋三将初次访华
改革印记:“带电栽培”助力中国新农业革命
你和哈佛的距离,只差一栋楼……亚裔控告哈佛大学招生歧视
国内英语资讯:CPC reviews documents on Party branches, official training
英国专家:上下班通勤也该算工作时间
国际英语资讯:News Analysis: European Commission rejects Italys budget plan, moving standoff to new phas
骇人:癌症细胞竟随器官移植传播
国际英语资讯:Universities of Portugal, Belgium sign agreements on student, teacher exchange
该不该为了工作搬家?
美国准备在网络战中采取主动
国际英语资讯:Peru opens case against former president
国际英语资讯:Pakistan arrests 16 Indian fishermen: officials
国内英语资讯:Xi announces opening of Hong Kong-Zhuhai-Macao Bridge
国际英语资讯:Over 60 intl businesses to attend Cuban trade fair
国内英语资讯:China-Singapore rail-sea transit route expands B&R cooperation
美国疾控中心证实:美国青少年正在用电子烟吸大麻
Snow Scenery 雪景
“开学三天就退群”引热议 如何避免成为群里那个讨厌的人?
体坛英语资讯:Corinthians name son of Brazil great Jairzinho as coach
遗传研究揭秘人类的潜在寿命
国内英语资讯:China committed to facilitating just settlement of Palestinian issue: vice president
国内英语资讯:China, India vow to strengthen cooperation on law enforcement, security
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |