Electric Backpack

　　1. Backpacks are convenient. They can hold your books, your lunch, and a change of clothes, leaving your hands free to do other things. Someday, if you dont mind carrying a heavy load, your backpacks might also power your MP3 player, keep your cell phone running, and maybe even light your way home.

　　3. The backpacks electricity-creating powers depend on springs used to hang a cloth pack from its metal frame. The frame sits against the wearers back, and the whole pack moves up and down as the person walks. A gear mechanism converts vertical movements of the pack to rotary motions of an electrical generator, producing up to 7.4 watts).

　　5. The backpack could be especially useful for soldiers, scientists, mountaineers, and emergency workers who typically carry heavy backpacks. For the rest of us, power-generating backpacks could make it possible to walk, play video games, watch TV, and listen to music, all at the same time. Electricity-generating packs arent on the market yet, but if you do get one eventually, just make sure to look both ways before crossing the street!

　　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 with you.

　　A) It produces electricity for electronic devices while the wearer walks.

　　C) It is small and convenient.

　　3. The word springs in Paragraph 3 means ____________.

　　B) the season of the year, occurring between winter and summer.

　　D) a length of metal wound around, which returns to its original shape after being pushed.

　　A) To make the backpack more comfortable for the wearer.

　　C) To test the advantage of the backpack.

　　5. What is implied in if you do get one eventually, just make sure to look both ways before crossing the street!

　　B) Enjoying electronic devices while walking may invite traffic accidents.

　　D) It is wise of you to have such a backpack.

　　1. 首先解讀標題：ElectricBackpack背包是大家日常生活中很熟悉的東西，但電子背包沒聽說過。帶著一份好奇，通讀一遍原文，大致了解，電子書包除了大家知道的普通功能之外，科學家還打算讓它具有更多更新的功能。雖然現在市場上還買不到，但總有一天會走進我們的生活，為我們帶來更多便利的。

　　1. Backpacks are convenient because___________.

　　B) They can hold as many things as you want to carry.你想帶多少東西，背包就能裝多少東西

　　D) You do not have to carry things with you. 你不用隨身攜帶東西了。

　　文章一開頭，就提到Backpacks are convenient.所以，我們一起把第一段讀完：They can hold your books, your lunch, and a change of clothes, leaving your hands free to do other things. Someday, if you dont mind carrying a heavy load, your backpacks might also power your MP3 player, keep your cell phone running, and maybe even light your way home.

　　3.看第二題：

　　A) It produces electricity for electronic devices while the wearer walks.

　　B) It can be used as cell phones, GPS in the military actions or field studies.

　　C) It is small and convenient. 它又小又方便。

　　題目的意思：由Lawrence和他的同事所發明的背包最重要的特征是什么?這是一道細節題。一起讀第二段：

　　通過對這一段的學習，我們知道了這種背包最重要的特性就是：當背上它的人一邊走就會一邊產生電能。所以答案為A。

　　3. The word springs in Paragraph 3 means ____________.

　　B) the season of the year, occurring between winter and summer.一年中的一個季節，介于冬季和夏季之間

　　D) a length of metal wound around, which returns to its original shape after being pushed. 來回繞的一段金屬，在被擠壓后能回復它的原形

　　The backpacks electricity-creating powers depend on springs used to hang a cloth pack from its metal frame.

　　Electric Backpack

　　1. Backpacks are convenient. They can hold your books, your lunch, and a change of clothes, leaving your hands free to do other things. Someday, if you dont mind carrying a heavy load, your backpacks might also power your MP3 player, keep your cell phone running, and maybe even light your way home.

　　3. The backpacks electricity-creating powers depend on springs used to hang a cloth pack from its metal frame. The frame sits against the wearers back, and the whole pack moves up and down as the person walks. A gear mechanism converts vertical movements of the pack to rotary motions of an electrical generator, producing up to 7.4 watts).

　　5. The backpack could be especially useful for soldiers, scientists, mountaineers, and emergency workers who typically carry heavy backpacks. For the rest of us, power-generating backpacks could make it possible to walk, play video games, watch TV, and listen to music, all at the same time. Electricity-generating packs arent on the market yet, but if you do get one eventually, just make sure to look both ways before crossing the street!

　　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 with you.

　　A) It produces electricity for electronic devices while the wearer walks.

　　C) It is small and convenient.

　　3. The word springs in Paragraph 3 means ____________.

　　B) the season of the year, occurring between winter and summer.

　　D) a length of metal wound around, which returns to its original shape after being pushed.

　　A) To make the backpack more comfortable for the wearer.

　　C) To test the advantage of the backpack.

　　5. What is implied in if you do get one eventually, just make sure to look both ways before crossing the street!

　　B) Enjoying electronic devices while walking may invite traffic accidents.

　　D) It is wise of you to have such a backpack.

　　1. 首先解讀標題：ElectricBackpack背包是大家日常生活中很熟悉的東西，但電子背包沒聽說過。帶著一份好奇，通讀一遍原文，大致了解，電子書包除了大家知道的普通功能之外，科學家還打算讓它具有更多更新的功能。雖然現在市場上還買不到，但總有一天會走進我們的生活，為我們帶來更多便利的。

　　1. Backpacks are convenient because___________.

　　B) They can hold as many things as you want to carry.你想帶多少東西，背包就能裝多少東西

　　D) You do not have to carry things with you. 你不用隨身攜帶東西了。

　　文章一開頭，就提到Backpacks are convenient.所以，我們一起把第一段讀完：They can hold your books, your lunch, and a change of clothes, leaving your hands free to do other things. Someday, if you dont mind carrying a heavy load, your backpacks might also power your MP3 player, keep your cell phone running, and maybe even light your way home.

　　3.看第二題：

　　A) It produces electricity for electronic devices while the wearer walks.

　　B) It can be used as cell phones, GPS in the military actions or field studies.

　　C) It is small and convenient. 它又小又方便。

　　題目的意思：由Lawrence和他的同事所發明的背包最重要的特征是什么?這是一道細節題。一起讀第二段：

　　通過對這一段的學習，我們知道了這種背包最重要的特性就是：當背上它的人一邊走就會一邊產生電能。所以答案為A。

　　3. The word springs in Paragraph 3 means ____________.

　　B) the season of the year, occurring between winter and summer.一年中的一個季節，介于冬季和夏季之間

　　D) a length of metal wound around, which returns to its original shape after being pushed. 來回繞的一段金屬，在被擠壓后能回復它的原形

　　The backpacks electricity-creating powers depend on springs used to hang a cloth pack from its metal frame.