2014考研英語復習:模擬試題之閱讀理解專項練習(二十三)_跨考網(wǎng)
2014考研英語復習:模擬試題之閱讀理解專項練習(二十三)
Text 4
Perhaps most puzzling than purring is the cat's ability to survive falls. A research shed light on this ability in 1987. The cat's habit of falling out of open windows provided the researchers with an opportunity to study 115 cats that had fallen from highrise apartments in New York City. The average fall was 5.5 stories. Of the 115 cats studied, 90 percent survived, including one cat that fell 32 stories on to a sidewalk and suffered only mild chest injury and a chipped tooth.Interestingly, cats that fell from 9 or more stories suffered fewer injuries than those falling from lower heights. Among cats that fell from 9 to 32 stories, only 5 percent suffered fatal injuries, but 10 percent of those that fell from 7 or fewer stories died.
How do cats manage to take falling so easily? For one thing, in comparison to human beings, a cat is much smaller and lighter. Also, a cat has more body surface area in proportion to its weight than a human being has. This increase in surface area results in greater air resistance, which slows the fall.The important thing,however, is that a falling cat apparently positions itself to form a sort of parachute. Less than one second after it starts to fall, a cat quickly rights itself in midair with all four legs pointing downward. The cat's inner ears act like an internal gyroscope, telling the cat which direction it is falling. With the legs pointed downward, the cat then spreads its legs so that its body forms a sort of parachute that increases air resistance. With its limbs flexed, the cat also cushions the force of impact by landing on all four legs. The force of the impact is distributed through the muscles and joints.
The researchers believe that the parachute effect comes into play mainly above four stories, at the point where the cat has reached its greatest rate of descent. Of the 115 cats the researchers studied, only 1 of 13 that fell nine or more stories sustained a bone fracture, whereas most of the cats that fell from lower stories suffered some type of broken bone.
36In the research it was found that the cats tend to suffer injuries or die when they fell from .
2022考研初復試已經接近尾聲,考研學子全面進入2023屆備考,跨考為23考研的考生準備了10大課包全程準備、全年復習備考計劃、目標院校專業(yè)輔導、全真復試模擬練習和全程針對性指導;2023考研的小伙伴針也已經開始擇校和復習了,跨考考研暢學5.0版本全新升級,無論你在校在家都可以更自如的完成你的考研復習,暑假集訓營帶來了院校專業(yè)初步選擇,明確方向;考研備考全年規(guī)劃,核心知識點入門;個性化制定備考方案,助你贏在起跑線,早出發(fā)一點離成功就更近一點!
考研院校專業(yè)選擇和考研復習計劃 | |||
2023備考學習 | 2023線上線下隨時學習 | 34所自劃線院??佳袕驮嚪謹?shù)線匯總 | |
2022考研復試最全信息整理 | 全國各招生院校考研復試分數(shù)線匯總 | ||
2023全日制封閉訓練 | 全國各招生院??佳姓{劑信息匯總 | ||
2023考研先知 | 考研考試科目有哪些? | 如何正確看待考研分數(shù)線? | |
不同院校相同專業(yè)如何選擇更適合自己的 | 從就業(yè)說考研如何擇專業(yè)? | ||
手把手教你如何選專業(yè)? | 高校研究生教育各學科門類排行榜 |
相關推薦
跨考考研課程
班型 | 定向班型 | 開班時間 | 高定班 | 標準班 | 課程介紹 | 咨詢 |
秋季集訓 | 沖刺班 | 9.10-12.20 | 168000 | 24800起 | 小班面授+專業(yè)課1對1+專業(yè)課定向輔導+協(xié)議加強課程(高定班)+專屬規(guī)劃答疑(高定班)+精細化答疑+復試資源(高定班)+復試課包(高定班)+復試指導(高定班)+復試班主任1v1服務(高定班)+復試面授密訓(高定班)+復試1v1(高定班) | |
2023集訓暢學 | 非定向(政英班/數(shù)政英班) | 每月20日 | 22800起(協(xié)議班) | 13800起 | 先行階在線課程+基礎階在線課程+強化階在線課程+真題階在線課程+沖刺階在線課程+專業(yè)課針對性一對一課程+班主任全程督學服務+全程規(guī)劃體系+全程測試體系+全程精細化答疑+擇校擇專業(yè)能力定位體系+全年關鍵環(huán)節(jié)指導體系+初試加強課+初試專屬服務+復試全科標準班服務 |