2. 职称考试
  3. Pushbike Danger Low speed bicycle crashes can badly injure — or even kill — ...

Pushbike Danger Low speed bicycle crashes can badly injure — or even kill — ...

admin2020-12-24  33
问题 Pushbike Danger
Low speed bicycle crashes can badly injure — or even kill — children if they fall onto the ends of the handlebars (车把).So a team of engineers is redesigning it to make it safer.
Kristy Arbogast，a bioengineer at the Children’s Hospital of Philadelphia in Pennsylvania, began the project with her colleagues. The cases they reviewed about serious abdominal (腹部的)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 came 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 cause for serious injuries. They discovered that most cases occur when children hit an obstacle at slow speed, causing them to topple (摇摆)over. To maintain their balance the children turn the handlebars through 90 degrees — but their momentum (冲力)forces them into the end of the handlebars. The bike then falls over and the other end of the handlebars hits the ground, pushing it into their abdomen (腹部).
The solution the group came up with is a handgrip (握柄)fitted with a spring and damping (咸速)system. The spring absorbs up to 50 per cent of the forces transmitted (传递)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 manufacturers were unaware of the problem，” says Arbogast.

How many abdominal injuries in children were caused by bicycle accidents?
选项 A Thirty.
B Ninety.
C 50 percent.
D More than a third.
答案D
解析该题是细节题，问的是在自行车事故中有多少例是导致孩子腹部受伤的？第二段讲Kristy Arbogast开始做这个项目是在一项研究有了结果之后，这项研究的结果表明在过去的30年里，超过三分之一的儿童腹部受重伤的情况起因于自行车事故。故答案为D。
转载请注明原文地址:https://ti.zuoweng.com/ti/AE9QKKKQ
相关试题推荐
随机试题