首页
财务会计
医药卫生
金融经济
考公考编
外语考试
学历提升
职称考试
建筑工程
IT考试
其他
登录
职称考试
Pushbike Danger Low speed bicycle crashes can badly injure — or even kill — ...
Pushbike Danger Low speed bicycle crashes can badly injure — or even kill — ...
admin
2020-12-24
30
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.
The engineers are trying to improve the handlebars because
选项
A they are not beautiful.
B they may kill children.
C they are likely to crash.
D they affect the speed of the bike.
答案
B
解析
文章在开始处就讲,儿童骑慢车跌倒时,如果撞在车把两端,会受重伤甚至丧命。因此,一些工程师才会重新设计这种欠合理的车把,以使其更安全。前面是因,后面是果。
转载请注明原文地址:https://ti.zuoweng.com/ti/5E9QKKKQ
相关试题推荐
MoneyorFriendshiporBoth 1Friendsandmoneydon'tmix.It'sadangerou...
共用题干 第三篇 NuclearPowerandItsDangerNqclearpower'sdangertohealth,safet...
共用题干 第三篇 NuclearPowerandItsDangerNqclearpower'sdangertohealth,safet...
共用题干 第三篇 NuclearPowerandItsDangerNqclearpower'sdangertohealth,safet...
共用题干 第三篇 NuclearPowerandItsDangerNqclearpower'sdangertohealth,safet...
共用题干 第一篇NuclearPowerandItsDangerNuclearpower'sdangertohealth,safety...
共用题干 第一篇NuclearPowerandItsDangerNuclearpower'sdangertohealth,safety...
共用题干 第一篇NuclearPowerandItsDangerNuclearpower'sdangertohealth,safety...
共用题干 NuclearPowerandItsDangerNuclearpower'sdangertohealth,safety,an...
Guestswerescaredwhenthebombexploded.A:killedB:endangeredC:rescuedD:frig
随机试题
(一) 某服装加工企业通过大规模的并购活动,煎饼多家中小服装企业,大幅提升了生
地西泮中有关物质的检查主要检查的杂质是 A.硝苯吡啶衍生物和亚硝苯吡啶衍生物
下述哪点不符合流脑皮疹的特点:
在项目结束阶段,项目经理的主要工作不包括( )。
在编制规划环境影响报告中,需进行跟踪评价的是()。
小张一定想报考某中学。因为所有想报考某中学的小学生都参加了该中学举办的冬令营,而小张参加了该中学举办的冬令营。下列哪项判断能够最好地加强上述论证?()A.所
第2题A.评剧表演艺术家B.前社区党支部书记C.谷文月的妻子D.谷文月的领导
有人说,工作的时候,我们要将重要事务放在主要位置,重要事务是必要条件,关系着一件事情成功与否。重要的事务没做好,一定不成功。但是,细节也是很重要的,细节是...
业主方的项目管理是( )的全过程,全方位的管理活动。A:项目建设期B:项目实施期C:项目决策期D:生产运营期