ElectricBackpack
Lawrence C. Rome and his colleagues from the University of Pennsylvania in Philadelphia2 and the Marine Biological Laboratory in WoodsHole3,Mass.4,have invented a backpack that makes electricity from energyproduced while its wearer walks. In military actions,search-and-rescueoperations,and scientific field studies,people rely increasingly on cellphones,global positioning system 5 receivers,night-vision goggles,andother battery powered devices to get around and do their work. The backpackselectricity- generating feature could dramatically reduce the amount of awearers load now devoted to spare batteries,report Rome and his colleagues inthe Sept.9 Science6.
Unexpectedly,tests showedthat wearers of the new backpack alter their gaits in response to the packsoscillations,so that they carry loads more comfortably and with less effortthan they do ordinary backpacks. Because of that surprising advantage,Rome plans to commercialize both electric and non-electric versionsof the backpack.
练习:
A they can be verylarge.
C your handsare freed to do other things.
2. 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.
3. 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
4. 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
"哪吒"重返银幕,引国内外影迷赞叹
灵异的负空间艺术:你看到了神马?
提高女性教育水平可控制人口增长
体坛英语资讯:China dominate table tennis doubles at Universiade
国内英语资讯:Fight against terrorism, extremism in Xinjiang should be supported, respected: Chinese FM
史上最大的拖鞋:中国厂家误读订单闹笑话
苏格兰果粉风中凌乱:Siri听不懂苏格兰口音
千万网友热译乔布斯情书:文言翻译成亮点
铁道部要求改善动车餐食
国际英语资讯:Two children among victims killed in festival shooting in N. California
鱼疗可传染HIV等病毒
土耳其东部发生7.2级地震:至少138人遇难
趣味英语阅读:考你的推理能力
爱喝咖啡的人耳根子比较软?
国际英语资讯:Egypt, Jordan urge resuming Palestinian-Israeli peace talks
国内英语资讯:Military-to-military relationship important part of China-Philippines ties: Chinese ambassad
不要再对单身人士说这些话了
法国第一夫人诞下千金
人工智能也有性别:Siri为啥是女的?
科学家发现最冷恒星 表面温度像地球夏天
波音要拨款50亿美元补偿航空公司
花50万美元买美国房可得居留签证?
不喜欢现在的工作? 看看你是不是搭错车了!
电影版《愤怒的小鸟》确定开拍
法国“第一千金”首露面 或为父连任做贡献
加重毛毯有助于缓解焦虑和失眠?
双语小说阅读:《谁动了我的奶酪》
瑞幸咖啡挡不住了,要进入中东和印度市场
韩国选美爆黑幕 英佳丽退赛
国际英语资讯:Mozambique pass amnesty bill eyeing lasting peace
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |