云南省2023-2024学年下学期高一年级开学考(24-355A)数学.考卷答案试卷答案,我们目前收集并整理关于云南省2023-2024学年下学期高一年级开学考(24-355A)数学.考卷答案得系列试题及其答案，更多试题答案请关注微信公众号：考不凡/直接访问www.kaobufan.com(考不凡)
云南省2023-2024学年下学期高一年级开学考(24-355A)数学.考卷答案试卷答案
以下是该试卷的部分内容或者是答案亦或者啥也没有，更多试题答案请关注微信公众号：考不凡/直接访问www.kaobufan.com(考不凡)
DCanexerciseduringchildhoodprotectyouagainstmemorylossmanyyearslater?Exerciseearlyinlifeseemstohavelifelongbenefitsforthebrain,inratsatleast."Thisisananimalstudy,butitshowsthatphysicalactivityatayoungageisveryimportant-notjustforphysicaldevelopment,butforthewholelifelongtrackofcognitivedevelopmentduringageing,saysMartinoftheUniversityofToronto,Canada."Inhumans,itmayputofftheappearanceofAlzheimer's(阿a兹海默症)symptoms,possiblytothepointofpreventingthem.“Martin'steamdivided80youngmaleratsintotwoequalgroups,andplacedrunningwheelsinthecagesofonegroupforaperiodofsixweeks.Aroundfourmonthslater-whentheratshadreachedmiddleage-theteamtaughtalltheratstoconnectanelectricshockwithbeinginaspecificbox.Whenplacedinthebox,theyfrozewithfear.Twoweekslater,theteamtestedtheratsinthreesituations:exactlythesameboxinthesameroom,thesameboxwiththeroomarrangeddifferently,andacompletelydifferentboxinadifferentroom.Theratswithoutaccesstoarunningwheelwhentheywereyoungnowfrozethesamepercentageoftimesineachofthesesituations,suggestingtheycouldn'trememberwhichonewasdangerous.Butthosethathadbeenabletorunintheiryouthfroze40to50percentlessinbothchangedboxsettings."Theresultssuggesttheamountofphysicalactivitywhenwe'reyoung,atleastforrats,hasinfluenceonbrainandcognitivehealth-intheformofbettermemories-whenwe'reolder,"saysArthurKramerofNortheasternUniversityinBoston,whohasfoundthat,inhumans,exerciseimprovesthegrowthofnewbraincells.32.ThestudyshowsthatA.exercisewhenyoungcanpreventmemorylosswhenolderinratsB.physicalactivityisimportantforphysicalhealthC.usingtherunningwheelsisofbenefittotherats'growthD.physicalactivitycanpreventhuman'sAlzheimer'ssymptoms33.Whatdoestheunderlinedword"it"inParagraph2referto?A.studyB.developmentC.benefitD.exercise34.HowareParagraph3and4mainlydeveloped?A.Byanalyzingcauses.B.Bygivinganexample.C.Byshowingdifferences.D.Bydescribingtheprocess.35.Whatistheauthor'sattitudetowardstheanimalstudy?A.Surprised..B.Critical(批判性的).C.Objective(客观的).D.Doubtful.第二节（共5小题：每小题2.5分，满分12.5分)根据短文内容，从短文后的选项中选出能填入空白处的最佳选项
选项中有两项为多余选项
Aeyouthinkingabouttravelingalone?Youmusthaveamillionquestions:Whereshouldyougo?Willtherebesomeonetotalkto?36Andisitallrighttotravelalone?Infact,travelingaloneisnotasscary()asitseems.HerearesomegoodtipsChooseaplacewhereyoufeelcomfortableandsafeTruthbetold,travelingaloneforthefirsttimeismoreabouttheexperiencethanthedestination.37Itcouldbesomewhereclosetohomeorsomewhereyou'vealreadybeenwithfriends.Makeaplan高一英语学科试题第5页（共8页）
分析根据四边形ABCD为直角梯形需要满足的条件即可求出．
解答解：设D（m，n），A（0，-1），B（0，2），C（2，0），
则$\overline{AB}$=（0，3），$\overrightarrow{BC}$=（2，-2），$\overrightarrow{DC}$=（2-m，-n），$\overrightarrow{AD}$=（m，n+1）
当$\overrightarrow{AB}$∥$\overrightarrow{DC}$时，即3（2-m）=0，解得m=2，
且$\overrightarrow{BC}$⊥$\overline{DC}$时，即2（2-m）+2n=0，解得n=0，
满足ABCD为直角梯形．
当$\overrightarrow{AD}$∥$\overrightarrow{BC}$时，即2（n+1）=-2m，
且$\overrightarrow{AD}$⊥$\overrightarrow{AB}$时，即3（n+1）=0，解得m=0，n=-1，
满足ABCD为直角梯形．综上所述D的坐标为（2，0）或（0，-1）
点评本题主要考查两个向量共线的性质，两个向量垂直的性质，两个向量坐标形式的运算，体现了分类讨论的数学思想，属于基础题．
