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2013年1月16日GMAT閱讀考試機(jī)經(jīng)

時(shí)間:2013-01-21 16:33:00   來(lái)源:無(wú)憂考網(wǎng)     [字體: ]
©無(wú)憂考網(wǎng)為大家整理了2013年1月16日GMAT閱讀考試機(jī)經(jīng),僅供參考!

 1月4日GMAT機(jī)經(jīng)已換,現(xiàn)在為大家整理的最新的1月GMAT閱讀機(jī)經(jīng),這一篇是風(fēng)暴之眼的文章,分享給大家,希望對(duì)大家有所幫助,文中觀點(diǎn)僅供參考。
  P1:過(guò)去對(duì)hurricane風(fēng)速的研究使用的方法只能測(cè)量flight level的風(fēng)速,然后科學(xué)家開始用dropwindsondes,從飛機(jī)上GPS的小球可以測(cè)量出相對(duì)ground level的風(fēng)速,然后說(shuō)整個(gè)風(fēng)暴max是發(fā)生在多少多少,然后storm eye的風(fēng)力(這里涉及到兩部分風(fēng)速的測(cè)量,near the eye&out of the eye)本月給的是測(cè)量eye surface(臺(tái)風(fēng)眼的外圈風(fēng)力)和outer reach surface(臺(tái)風(fēng)最外圈的風(fēng)力),對(duì)于eye surface(near the eye)max通常發(fā)生在一個(gè)某某高度,而對(duì)于out reacher(out of the eye)則發(fā)生在更高處,給了一個(gè)例子說(shuō),near the eye 30層高處比地面處風(fēng)速快20miles/h.然后說(shuō)相對(duì)于flight level 高空風(fēng)速,eye surface地面時(shí)高空的90%,out reacher地面時(shí)高空的78%,也就是說(shuō)一個(gè)當(dāng)做的話,另外兩個(gè)點(diǎn)都小一點(diǎn)
  P2:緊接這上段末尾的這個(gè)規(guī)律,講了一個(gè)例外,
  說(shuō)有一次,以前一直是一位上層比ground level厲害,結(jié)果某某臺(tái)風(fēng),測(cè)量的結(jié)果是flight高度風(fēng)力才150,另外兩個(gè)風(fēng)力比它還高/結(jié)果這個(gè)颶風(fēng)是ground level比上層厲害,這就說(shuō)明了,科學(xué)家之前認(rèn)為的規(guī)律是有例外的,而且需要根據(jù)實(shí)際情況修正。然后分析這種例外,可能是由于什么導(dǎo)致的:
  一是:跟convection猜測(cè)是對(duì)流有關(guān)
  二是:和sea surface的熱氣流有關(guān),最有一句話作者說(shuō)要是不是的轉(zhuǎn)換方法態(tài)度來(lái)測(cè)颶風(fēng)什么的/用一些原始工具如氣壓表,溫度計(jì)幫助調(diào)整參數(shù)是很必要的。
  背景知識(shí)
  Since 1997, forecasters have used Global Positioning System dropwindsondes, a measuring device dropped from hurricane reconnaissance aircraft into the eyewall—the windiest part of the hurricane. The sonde system measures temperature, barometric pressure, water vapor, and wind data every 15 feet on its way down. This new method gave meteorologists an important glimpse into the true strength of these devastating storms. The analyses of the dropwindsonde data indicated that, on average, the maximum sustained surface-wind speed was about 90 percent of the wind speed measured at the 10,000-foot aircraft level flown as Andrew approached south Florida. In 1992 Andrew's wind speed was estimated at 75 to 80 percent of the aircraft observations. The research findings resulted in an increase in the estimated wind speeds of Hurricane Andrew from 145 mph to 165 mph. Read more: Hurricanes - average, low, world, high, days, Hurricane and tropical storm season, Portrait of a hurricane, Hurricane casualties, The nations worst weather

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