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【阅读理解Scientistshavecreatedatomatothatcangrowonsaltywater.Theplantisthefirstcropofitskindeverproducedintheworld.Itssignificancecannotbeoverestimated(过】
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问题描述:

(1)

(2)

阅读理解

  Scientistshavecreatedatomatothatcangrowonsaltywater.Theplantisthefirstcropofitskindeverproducedintheworld.

  Itssignificancecannotbeoverestimated(过高估计).Thenewtechnologycanhelpmankindsolvetheproblemoffeedingitsever-growingpopulation.Itisestimatedthatby2050theworldpopulationwillrisetomorethan9billionanincreaseof3billionover2000.Eachday240000morepeoplearebornreadytobefedliketherestofus.

  UnfortunatelynotallthelandonEarthcanbeusedtogrowcropsofhumans.About24.7millionacresoflandislosttoagricultureeachyearbecausethelandhasbecometoosalty.Themaincauseoftheproblemisirrigation.Whenfarmerswatertheircropssaltsinthewateralsoenterthesoil.Overtimesaltssuchassodiumandcalciumbuilduptosuchapointthattheyseverelyharmthegrowthofcrops.Saltsdestroymostplants’abilitytodrawupwaterthroughtheirroots.

  ButthenewtypeoftomatoproducedbyAmericanandCanadianscientistscanstoresaltsinitsleavessothatthefruitdoesn’ttastesalty.Researchershopethistechnologywillenableareasofpoor-qualitylandtobecomeproductivesomeday.Andtheycanfeedsomeoftheworld’sgrowingpopulation.

Whatisthesignificanceofthisnewtechnology?

[  ]

A.

Itcanrelievetheburdenoffeedingthegrowingpopulation.

B.

Itcanhelptheplantcompletelyabsorbsaltsinthesoil.

C.

Itcanmakethedesertintothegood-qualityfield.

D.

Itcanmakethelandlesssalty.

WecanknowfromthethirdParagraphthat________.

[]

A.

thelandhasbeenpollutedseriously

崔援民回答:
  答案:1.A;2.B;3.B;4.D;解析:(1)细节理解题。第二段“Thenewtechnologycanhelpmankindsolvetheproblemoffeedingitsever-growingpopulation.”可知这个新技术的重要意义。(2)推理判...
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