[解析]
BDBA
(1)B.推理判断题.根据文章前两段内容"You've got your fancy new suitcase and you're ready to take it with you on your travels across the globe…your heart sinks when you realize your new suitcase has got a serious case of the wobbles (摇晃)."以及第三段中" Why does this happen?"可知,前两段假设了一个情景,你拿着手提箱去旅游,你拉着手提箱,行李箱摇摇晃晃,由此引出了手提箱摇晃的问题,为什么会出现这样的问题?由此推断,前两段是为了引出带轮的手提箱摇晃的问题,故选B.
(2)D.细节理解题.根据文章第六段中"It was soon noted that the "wobble" was actually a result of repeated actions that caused the suitcase to sway from side to side.They discovered that if one of the wheels encountered an obstacle such as a small bump,it jumped into the air for just a moment and then banged back down to the ground.That second action caused the opposite wheel to lift off the ground and then to bang back down,causing the first to lift again and so on."可知,如果手提箱一个轮子遇到障碍物,它会跳入空中一会,然后回到地面,这又造成另一个轮子起来再回到地面,如此重复,由此可知,当手提箱遇到障碍物,会有一系列重复动作,导致摇摆问题,可见摇晃问题实际上是一系列重复动作引起的结果,故选D.
(3)B.细节理解题.根据文章倒数第三段"Instead of slowing down when we see a rocky part of the path,the scientists recommended doing the exact opposite and speeding up.This is because going faster gives the wheels less time to rise and fall,preventing the case from swaying."可知,科学家建议我们遇到不平整的路面时要加速,因为加速可以使轮子起来落下的时间减少,从而阻止手提箱摇摆,故选B.
(4)A.细节理解题.根据文章倒数第二段中" "These findings could help researchers simulate and design better rolling suitcases and other pulled trolleys,such as towed trailers ," Courrech du Pont added."可知,这些发现帮助研究者设计更好地手提箱,帮助提高手提箱的设计,故选A.