2025年考研英语阅读理解标准90篇+提高30篇unit（突破训练）0 .pdfVIP

乐民之乐者，民亦乐其乐；忧民之忧者，民亦忧其忧。——《孟子》

Unit20

Careanddiligencebringluck.

谨慎和勤奋才能抓住机遇。

学习内容题材词数建议时间得分统计做题备忘

PartAText1科普知识380/10

Text2商业经济425/10

Text3社会生活475/10

Text4文化教育457/10

PartB商业经济713/10

PartC科普知识415/10

PartA

Directions：Readthefollowingtexts.Answerthequestionsbloweachtextbychoosing[A],[B],[C]

or[D].

Text1

Withadvancingage,ourbodiesexperienceaninevitablelossofbone.Twomajorstudiesin

elderlypopulationsnowunderscoretheimportanceofdietaryproteininthisstructuralerosion,

whichcanleadtoosteoporosis.Thereportscometosharplydifferentconclusion,however,about

theeffectofanimalproteinontherateofboneloss.

Inonestudy,dietsrichinanimalproteincorrelatedwithgreaterbonelossandfracturerisk.

Intheother,animalproteinappearedtoprotectbone.

Suchcontradictions,“whicharenotverysatisfying”,oftenemergefromobservationalstudies

whereresearchersrecordthenaturalhabitsandhealthofpeople,notesRobertP.Heaneyof

CreightonUniversityMedicalCenterinOmaha,Neb.“That’snotacriticismofsuchstudies,”he

says,“justareminderoftheuncontrollablevariablescommoninpopulations.”

However,henotes,the