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! 1. Backpacks are convenient because B they can hold as many things as you want to carry. D you do not have to carry things withyou. 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. 1.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。 3.D springs在此是弹簧的意思。spring是一个多义词:泉水、春天、弹跳。 5.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。
2017届高考英语一轮语法专题复习:12 定语从句(新人教版)
2016届高考英语二轮秒杀高中英语重点系列:重点1 祈使句的固定句式
2016届高考英语二轮复习语法篇课件:专题3 非谓语动词(新课标全国通用)
2016届高考英语二轮复习语法篇课件:专题6 并列连词与复合句(新课标全国通用)
2016届高考英语二轮复习攻关篇专题训练:题型1 阅读理解2.2.6(新课标全国通用)
2016届高考英语二轮秒杀高中英语重点系列:重点3 until 引导的时间状语从句
2016届高考英语二轮复习攻关篇专题训练:题型1 阅读理解2.2.3(新课标全国通用)
2017届高考英语一轮语法专题复习:13 名词性从句(新人教版)
外国经济学家说:中文是最实用的外语
2016届高考英语二轮秒杀高中英语重点系列:重点11 情态动词+动词不定式完成结构的用法
2016届高考英语二轮复习攻关篇专题训练:题型3 完形填空2.3.3(新课标全国通用)
2016届高考英语二轮复习语法篇课件:专题7 句子结构与特殊句式(新课标全国通用)
2016届高考英语二轮复习攻关篇专题训练:题型1 阅读理解2.2.2(新课标全国通用)
为什么睡前你老觉得饿要吃东西?
2017届高考英语一轮语法专题复习:10 连词与并列句(新人教版)
世界城市生活成本排名发布 亚洲城市垄断前几位
2016届高考英语二轮秒杀高中英语重点系列:重点6 主动表示被动的单词
2016届高考英语二轮复习攻关篇专题训练:题型3 完形填空2.3.2(新课标全国通用)
2016届高考英语二轮复习语法篇课件:专题4 形容词、副词、名词的变化(新课标全国通用)
中国科学家研制出最快30秒测血型试纸
2016届高考英语二轮复习攻关篇专题训练:题型3 完形填空2.3.4(新课标全国通用)
2017届高考英语一轮语法专题复习:5 形容词与副词(新人教版)
2017届高考英语一轮语法专题复习:8 动词的时态与语态(新人教版)
2016届高考英语二轮复习语法篇课件:专题2 情态动词与虚拟语气(新课标全国通用)
2016届高考英语二轮秒杀高中英语重点系列:重点4 what和that引导的名词性从句
2016届高考英语二轮秒杀高中英语重点系列:重点5 worth ,worthy& worthwhile的用法区别
2016届高考英语二轮秒杀高中英语重点系列:重点2 与so neither 相关的句型
2016届高考英语二轮复习攻关篇专题训练:题型1 阅读理解2.2.1(新课标全国通用)
2017届高考英语一轮语法专题复习:6 情态动词(新人教版)
2017届高考英语一轮语法专题复习:7 虚拟语气(新人教版)
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |