首页
登录
职称英语
The first bicycles were made of wood. Cycle manufacturers then switched to
The first bicycles were made of wood. Cycle manufacturers then switched to
游客
2023-06-19
15
管理
问题
The first bicycles were made of wood. Cycle manufacturers then switched to steel tubes. These days, for high-end bikes where weight is a priority, they use aluminium alloys (铝合金) or even carbon fibre. But Izhar Gafni, an amateur cyclist who owns a number of such fancy bikes, wonders whether the original inventors had a point. He proposes to go back to using wood—or, rather, a derivative (衍生物) of wood, namely cardboard.
Mr. Gafni, who is based in Ahituv, Israel, spent years trying to work out how to make a cardboard bicycle able to support the weight of a human being. The trick is twofold. First, he folds the cardboard— commercial-grade material, made from recycled paper—to increase its strength. Then, once it is folded, he treats the result with a proprietary resin (树脂) that holds it in shape and stiffens it, before cutting it into the form of the component required. A second application of resin renders the component waterproof, and a lick of lacquer (漆) makes it look good. The result, Mr. Gafni claims, is stronger than carbon fibre.
The bike’s frame, wheels, handlebars and saddle are all made of cardboard in this way, and then fitted together. The tyres—again harking back to the early days of cycling—are composed of solid rubber, which is recycled from old car tyres. That makes the ride a little harder than if the tyres were pneumatic (充气轮胎的), but means they cannot be punctured.
The chain is also made from car-tyre rubber. The pedals are plastic recycled from bottles and the brakes are recycled too, though Mr. Gafni is not yet ready to disclose the details. The finished product weighs 9kg, a bit less than an ordinary bike, and can carry a rider weighing 220kg.
Mr. Gafni’s target market is the poorer countries of the world. Because manufacturing the cardboard bike will, he reckons, cost $ 9 - 12 a unit, and his design is far more affordable than a steel-framed bike. But people in rich countries may be interested too. In Tel Aviv, the commercial capital of Mr. Gafni’s native land, 2,000 stolen bikes were recently put on display by police, for their owners to claim. If bicycles cost less than the locks that chained them to lampposts, thieves might not think it worthwhile to steal them. [br] What effect does the proprietary resin have on the cardboard?
选项
A、It makes the bicycle even lighter.
B、It helps the cardboard to maintain its shape.
C、It makes the cardboard easy to fold.
D、It gives the bicycle a good look.
答案
B
解析
由题干中的proprietary resin定位到第二段第四句。细节辨认题。由定位句可知,加夫尼先生对纸板进行了折叠,并用一种专利树脂加以处理,使之成形、固定,因此B)“它帮助纸板保持形状”为正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/2763877.html
相关试题推荐
With10,600bicyclesincirculation,Pariscityofficialsarehopingthepro
With10,600bicyclesincirculation,Pariscityofficialsarehopingthepro
With10,600bicyclesincirculation,Pariscityofficialsarehopingthepro
With10,600bicyclesincirculation,Pariscityofficialsarehopingthepro
With10,600bicyclesincirculation,Pariscityofficialsarehopingthepro
[originaltext][3]Medicalresearchershaveaccusedthemanufacturersofbaby
Thefirstbicyclesweremadeofwood.Cyclemanufacturersthenswitchedto
Thefirstbicyclesweremadeofwood.Cyclemanufacturersthenswitchedto
Thefirstbicyclesweremadeofwood.Cyclemanufacturersthenswitchedto
Thefirstbicyclesweremadeofwood.Cyclemanufacturersthenswitchedto
随机试题
PASSAGEFOUR[br]WhathadMr.Saintalwaysworkedasbythetimehesetupshop
AninterestingfeatureofeducationintheUnitedStatesisthecommunityco
Costly—sometimesabusive—creditcardsarebleedingmillionsofborrowerswho
我国《宪法》和法律所确立的解决我国民族问题的基本政治制度是()。A.民族区域自
采用三个同条件制作和养护的标准试件进行混凝土抗弯拉强度试验,请回答下列问题。
患者男性,62岁,发现右腹股沟可复性肿物5年,肿物突出不能还纳7小时,疼痛剧烈,
以下哪项不符合表证的临床特征A.恶寒发热B.头身疼痛C.腹中冷痛D.咽痛咳嗽E.
下列有关采矿权转让合同解除的相关说法正确的是:()A.采矿权出让合同签订后
工程保险的主要险种有()。A:建筑工程一切险 B:安装工程一切险 C:承包商
关于劳动防护用品的维护、更换及报废,下列叙述错误的是()。A.劳动防护用品
最新回复
(
0
)