Pushbike Peril 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 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(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 come up with some countermeasures(对策). " she says. By interviewing the children and their parents, Arbogast and her team were able to reconstruct(重建; 重构) many of the accidents and identified a common mechanism responsible for serious in A. why the children and their parents were interviewed. B. when the children tom the handlebars through 90 degrees. C. what causes the children to topple over. D. how serious injuries occur. [判断题]GB/T 11944-2002《中空玻璃》,中空玻璃放置露点仪后玻璃局部冷却,当达到一定温度后,内部水气在冷点部位结露,该温度为露点。( )
A.正确 B.错误 [名词解释]行政行为的公定力
[判断题]公安民警制止违法犯罪行为人后,应当立即使用手铐、警绳等约束性警械将其约束。
A.正确 B.错误 [单选题]非味感受器也能感受其味感的是()味。
A.酸 B.苦 C.咸 D.辣 [简答题]
设函数f(x)在(-ι,ι)上连续,在点x=0处可导,且f’(0)≠0。 求证:任意给定的0<x<ι,存在0<θ<1,使得[*]。[单选题]事故/事件的处理应以事实为依据,以规章为准绳,按照“( )”原则,认真调查分析,查明原因,分清责任,吸取教训,制定对策,防止同类事故/事件再次发生。
A.四不放过 B.五同时 C.三同时 D.安全第一,预防为主 我来回答: 提交
|