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【单选题】

Pushbike Peril
Low speed bicycle crashes can badly injure--or even kill--children if they fall onto the ends of the handlebars so a team of engineers is redesigning the humble handlebar in a bid to make it safer.
Kristy Arbogast, a bioengineer at the Children's Hospital of Philadelphia in Pennsylvania, began the project with her colleagues after a study of serious abdominal injuries in children in the past 30 years showed that more than a third were caused by bicycle accidents.' The task was to identify how the injuries occurred and come up with some countermeasures.' she says.
By interviewing the children and their parents, Arbogast and her team were able to reconstruct many of the accidents and identified a common mechanism responsible for serious injures.They discovered that most occur when children hit an obstacle at a slow speed, causing them to topple over.To maintain their balance they turn the handlebars through 90 degrees--but their momentum forces them into the end of the handlebars.The bike then falls over and the other end of the handlebars hits the ground, ramming it into their abdomen.
The solution the group came up with is a handgrip fitted with a spring and damping system.The spring absorbs up to 50 per cent of the forces transmitted through the handlebars in an impact.The group hopes to commercialize the device, which should add only a few dollars to the cost of a bike.'But our task has been one of education because up until now, bicycle manufacturer were unaware of the problem.' says Arbogast.
The team has also approached the US Consumer Product Safety Commission to try to persuade manufacturers to adopt the new design A decision is expected later this year.
handlebar n(常用复数) (自行车等的) 车把
abdominal adj.腹部的 redesign v.重新设计
bioengineer n.生物工程师 reconstruct vt.重建; 重构
countermeasure n.对策 abdomen n.腹部
momentum n.冲力 handgrip n.握柄
damping adj.制动的;减速的,缓冲的 commercialize vt.使商品化
According to the passage, some engineers are trying to improve the handlebars because

A.
they are not noble enough
B.
they may kill children
C.
they are likely to crash
D.
they make the bike move at a low speed
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参考答案:
举一反三

【单选题】商品化育苗采用的基质材料是( )。

A.
草炭、珍珠岩、蛭石
B.
草炭、沙土、蛭石
C.
草炭、壤土、蛭石
D.
草木灰、珍珠岩、蛭石

【单选题】自行车的前轴属于

A.
固定心轴
B.
转动心轴
C.
传动轴
D.
转轴

【单选题】组织在每次控制措施设计、重新设计()

A.
应对危害分析前的规定信息(即产品特性描述等)进行更新
B.
必要时对HACCP计划进行修正
C.
必要时对组成操作性前提方案的程序和指导书进行修正
D.
以上都对

【单选题】选择商品化会计软件的局限性是()。

A.
价格低
B.
对于某些企业,所需功能不能一步到位
C.
软件质量没有保证
D.
见效不快
相关题目:
【单选题】商品化育苗采用的基质材料是( )。
A.
草炭、珍珠岩、蛭石
B.
草炭、沙土、蛭石
C.
草炭、壤土、蛭石
D.
草木灰、珍珠岩、蛭石
【单选题】自行车的前轴属于
A.
固定心轴
B.
转动心轴
C.
传动轴
D.
转轴
【单选题】组织在每次控制措施设计、重新设计()
A.
应对危害分析前的规定信息(即产品特性描述等)进行更新
B.
必要时对HACCP计划进行修正
C.
必要时对组成操作性前提方案的程序和指导书进行修正
D.
以上都对
【单选题】选择商品化会计软件的局限性是()。
A.
价格低
B.
对于某些企业,所需功能不能一步到位
C.
软件质量没有保证
D.
见效不快
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