回答题
FeedtheWorldwithPotatoes
1.Asfoodpricescontinuetoriserapidly,thereisgrowingconcernabouttheeffectitwillhaveamongtheworld’spoor.
2.Increasingly,expertsarelookingtothepotatoasapossiblelow-costsolutiontofeedingthehungry.Toemphasizetheissue,theUnitedNationshascalledthepotato“ahiddentreasure”andnamed2008theInternationalYearofthePotato.Here’showpotatoescouldendthefoodcrisis.
3.Thepotatomaturesmorequickly,onlesslandandinharsherclimatethanmostothermajorcrops.Upto85percentoftheplantiseatable,comparedwitharound50percentofcereals.Itsbroadadaptabilitytoawidevarietyoffarmingsystemsisalsonoteworthy.
4.Potatoesareanexcellentsourceofcomplexcarbohydrates,whichisreleasetheirenergyslowly,andhaveonly5percentofwheat’sfatcontent.Theycontainonlyaquarterofthecaloriesofbreadand,accordingtothePotatoCenter,whenboiled,potatoeshavemoreproteinandnearlytwicethecalciumascorn.Additionally,theyaregoodsourceofvitaminC,iron,potassium（钾）andzinc(锌).
5.ThefoodandAgricultureOrganizationrecentlysurveyedfoodpriceinflatiountries.Cerealpriceinflationwasmuchhigherandfarmorewidesprninover70ofthepoorcoeadthanforpotatoes.Asignificantfactorbehindthepotato’saffordabilityisthefactthatunlikeotheragricultureproducts,thepotatoisnotyetaglobalcommodity,andhasthereforenotattractedspeculativeinvestors.Rawpotatoesareheavyandcarrotduringtransmit,soglobaltradehasbeenshowtotakeofAlso,potatoesaresusceptible（易受影响的）toinfectionwithdisease,hindering(阻碍)export.Accordingtoanalysts’estimates,lessthan5percentofpotatoesaretradedinternationally,withpricesdrivenprimarilybylocaltastesinsteadofinternationaldemand.
Paragraph2___