Althoughtheyareaninexpensivesupplierofvitamins，minerals，andhigh-qualityprotein，eggsalsocontainahighlevelofbloodcholesterol（胆固醇），oneofthemajorcausesofheartdisease．Oneeggyolk，infact，containsalittlem|小学英语问答-字典翻译问答网

Althoughtheyareaninexpensivesupplierofvitamins，minerals，andhigh-qualityprotein，eggsalsocontainahighlevelofbloodcholesterol（胆固醇），oneofthemajorcausesofheartdisease．Oneeggyolk，infact，containsalittlem

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问题描述：

Thisknowledgehascausedeggsalestodropinrecentyears，whichinturnhasbroughtaboutthedevelopmentofseveralalternativestoeatingregulareggs．Onealternativeistoeatsubstituteeggs．Theseeggsubstitutesarenotrealeggs，buttheylooksomewhatlikeeggswhentheyarecooked．Theyhavetheadvantageofhavinglowercholesterolrates，andtheycanbescrambledorusedinbaking．Onedisadvantage，however，isthattheyarenotgoodforfrying，poaching，orboiling．Asecondalternativetoregulareggsisanewtypeofeggs，sometimescalled"designer''eggs．Theseeggsare producedbyhensthatarefedlow-fatdietsconsistingofingredientssuchascanolaoil，flax，andricebran．Inspiteoftheirdiets，however，thesehensproduceeggsthatcontain thesameamountofcholesterolasregulareggs．Yet，producersoftheseeggsclaimthateatingtheireggswillnotraisethebloodcholesterolinhumans．

Eggproducersclaimthattheirproducthasbeendescribedunfairly．Theyusescientificstudiestobackuptheirclaim．And intact studiesontherelationshipbetweeneggsandhumancholesterollevelshavebroughtmixedresults．Itmaybethatitisnotthetypeofeggthatisthemaindeterminantofcholesterolbutthepersonwhoiseatingtheeggs．Somepeoplemaybemoresensitivetocholesterolfromfoodthanotherpeople．Infact，thereisevidencethatcertaindietaryfatsstimulatethebody'sproductionofbloodcholesterol．Consequently，whileitstillmakessensetolimitone'sintakeofeggs，evendesignereggs，itseemsthatdoingthiswithoutregulatingdietaryfatwillprobablynothelpreducethebloodcholesterollevel．

46．Accordingtothispassage，whichofthefollowingisacauseofheartdisease？___

A．High-qualityprotein

B．Cholesterol

C．Canolaoil

D．Minerals

47．Themaincauseoftherecentdropineggsalesis___．

A．theproductionofsubstituteeggsanddesignereggs

B．thechangesinhen'sdie

李建新回答：

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　　46．B．细节理解题．根据文章第一段"eggsalsocontainahighlevelofbloodcholesterol（胆固醇），oneofthemajorcausesofheartdisease"可知胆固醇会引发心脏病；故选B．　　47．D．细节理解题．根据文章第一段"Oneeggyolk，infact，containsalittlemorethantwo-thirdsofthesuggesteddailycholesterollimit"，可知鸡蛋胆固醇高，因此销量下降；故选D．　　48．B．细节理解题．根据文章第二段"Theyhavetheadvantageofhavinglowercholesterolrates，andtheycanbescrambledorusedinbaking"可知鸡蛋适合烘烤着吃；故选B．　　49．C．主旨大意题．通读全文，可知文章主要在介绍鸡蛋与胆固醇之间的关系，鸡蛋含有较高胆固醇，但是适当的吃法也可以降低胆固醇；故选C．　　50．C．推理判断题．通读全文，可知鸡蛋含有较高胆固醇，会影响人体内胆固醇含量，但是并不会决定胆固醇含量；故选C．