• 
    

    
    

      99热精品在线国产_美女午夜性视频免费_国产精品国产高清国产av_av欧美777_自拍偷自拍亚洲精品老妇_亚洲熟女精品中文字幕_www日本黄色视频网_国产精品野战在线观看

      ?

      Farms Sprout in Cities etc.

      2013-03-11 06:58
      中學(xué)科技 2013年1期
      關(guān)鍵詞:斜體字摩天大樓種植業(yè)

      Whenyouheartheword"farm",chancesareyoupicturerollinghillsinthecountrycoveredwithcowsandcornstalks.Butsomescientists,engineersandcityplannerssaythefarmsofthefuturecouldrisestraightintotheair-inskyscrapersintheworld'smostpopulatedcities.

      Thoseintheknowsaybringingfarmingindoorssolvesanumberofproblems.First,traditionalfarmingtakesupalotofland,whilecitiesthatgrowtheirownfoodwouldbecomemoreself-reliant,andlessvulnerabletocatastrophessuchashurricanes.Totopitoff,bytheyear2050,theworldpopulationwillgrowbyanother3billion.Aspopulationsgrow,thelandavailableforfarmingshrinks,raisinganimportantquestion:wherewillwegrowthefoodforallthesepeople?Scientistssay"verticalfarming"-growingcropsinskyscraperstensofstorieshigh-istheanswer.

      Butthosefamiliarwiththehurdlesofgrowingcropsindoorssayit'snotgoingtobeeasytomakethetransitiontoverticalfarming.Itcanbetrickytoregulateclimateconditionsindoors.Maintainingthecorrectbalanceofhumiditycanbeespeciallychallenging.Mimickingsunlightistooexpensiveforwidespreaduseyet.

      That'snot tosay thesechallengeswon't beover-come-butitwilltaketime.Mostexpertssuggestitwouldbeanywherebetween5and15yearsbeforethefirstverticalfarmscouldbecreated.

      當(dāng)你聽到“農(nóng)莊”這個詞時,很可能你腦子里想象到的是鄉(xiāng)下那些遍地牛羊和谷物的連綿起伏的山崗。但有些科學(xué)家、工程師和城市規(guī)劃師說,未來的農(nóng)莊有可能會直接向空中伸展——坐落在世界上人口最多的城市的摩天大樓里。

      知情人士稱把種植業(yè)引進(jìn)室內(nèi)可以解決許多問題。首先,傳統(tǒng)的種植業(yè)占用大量土地,而能自行種植食物的城市更可實現(xiàn)自給自足,且較少受到災(zāi)難(如颶風(fēng))的影響。加之,到2050年世界人口將再增加30億。隨著人口的增加,可耕地越來越少,這就產(chǎn)生了一個嚴(yán)重問題:我們將在什么地方為這些人種植食物呢?科學(xué)家們認(rèn)為,答案是“垂直種植”——把作物種在幾十層樓高的摩天大樓里。

      但熟知室內(nèi)種植莊稼困難的人士卻認(rèn)為,過渡到垂直種植并不是一件容易的事。調(diào)節(jié)室內(nèi)的氣候條件相當(dāng)困難,保持室內(nèi)適當(dāng)?shù)臐穸扔葹椴灰?,而模擬陽光的代價則太大了,還不適合推廣。

      這并不意味著這些困難就不能被克服——但要克服它們還需要時間。多數(shù)專家認(rèn)為要建立起第一座垂直農(nóng)莊還需要5到15年的時間。

      (翻譯時請注意斜體字的譯法)

      GlobalTemperaturesFourthHighestonRecord

      AccordingtoNOAA(NationalOceanicandAtmosphericAdministration美國國家海洋和大氣局)scientists,thegloballyaveraged(1)t forJune2012markedthefourthwarmestJunesincerecordkeepingbeganin1880.Thecombinedaveragetemperatureovergloballandandoceansurfaceswas61.03°F,1.13°Fabovethe20th(2)c average.June2012alsomarksthe36thconsecutiveJuneand328thconsecutivemonthwithaglobaltemperatureabovethe20thcenturyaverage.Thelastbelow-averagetemperatureJunewasJune1976andthelastbelow-averagetemperature(3)m wasFebruary1985.

      Mostareasoftheworldexperiencedmuchabove-averagemonthlytemperatures,includingmostofNorthAmericaandEurasia(歐亞大陸),and(A)n Africa.OnlyAustralia,northernandwesternEurope,andthenorthwesternUnitedStateswerenotablycoolerthan(B)a Austriarecordedits(C)h everJunetemperatureof99.9°FonJune30.ThemonthlytemperatureduringJuneintheUnitedKingdomwas0.5°Fbelowthe1971~2000average,makingthisthecoolestJunesince1991.Australiaalsoremained(D)c thanaverageduetothelingeringeffectsofLaNi?a(拉尼娜現(xiàn)象).

      Fortheocean,theJuneglobalsea(4)s temperaturewas0.85°Fabovethe20thcenturyaverageof61.5°F,the10thwarmestJuneon(E)r .AccordingtoNOAA'sClimatePredictionCenter,thereisanincreasedchancethatElNi?oconditionswillemergebeginninginJuly-September2012.ElNi?oisoften,butnotalways,associatedwith(5)g

      temperaturesthatarehigherthantemperaturesintheneutralandLaNi?aphases.

      (A,B,C,D,EFORCROSS,1,2,3,4,5FORDOWN.Thefirstlettersoftheabsentsweregiven)

      Divisiblefrom1to9

      Findanumberconsistingof9digitsinwhicheachofthedigitsfrom1to9appearsonlyonce.Thisnumbershouldsatisfythefollowingrequirements:

      a.Thenumbershouldbedivisibleby9.

      b.Ifthemostrightdigitisremoved,theremainingnumbershouldbedivisibleby8.

      c.Ifthenagainthemostrightdigitisremoved,theremainingnumbershouldbedivisibleby7.

      d.etc.untilthelastremainingnumberofonedigitwhichshouldbedivisibleby1.

      上期答案

      上期ReadingComprehension答案

      1.D 2.D 3.C

      上期Crossword答案

      1.repair 2.passive 3.adapts 4.cell

      A.essential B.conditions C.healthy D.effect

      上期Illation答案

      Thepeoplewhowentfishing,weregrandfather,fatherandson.Thenthereweretwofathersandtwosons.

      猜你喜歡
      斜體字摩天大樓種植業(yè)
      計量單位的具體要求
      計量單位的具體要求
      THE SKY’S THE LIMIT
      斜體字母、大小寫字母使用規(guī)范
      計量單位的具體要求
      摩天大樓
      種植業(yè)結(jié)構(gòu)調(diào)整中存在的問題及對策
      種植業(yè)
      鉆研種植業(yè) 帶頭奔小康童進(jìn)禮
      種植業(yè)飼養(yǎng)業(yè)他都行
      云浮市| 济宁市| 晋中市| 文水县| 彰武县| 镇赉县| 大安市| 石屏县| 正蓝旗| 六盘水市| 济南市| 新丰县| 通州市| 宾川县| 九龙县| 海伦市| 监利县| 紫云| 瓮安县| 芦溪县| 阳朔县| 林芝县| 安新县| 蒙山县| 龙山县| 黄冈市| 那坡县| 临高县| 长宁县| 千阳县| 尼玛县| 镇原县| 洛南县| 遂宁市| 鄂温| 水富县| 白朗县| 大新县| 六安市| 隆林| 汉中市|