河南省郸城县2024年七升八暑假大预习测试卷(物理)试卷答案试卷答案,我们目前收集并整理关于河南省郸城县2024年七升八暑假大预习测试卷(物理)试卷答案得系列试题及其答案，更多试题答案请捕获只因吧
河南省郸城县2024年七升八暑假大预习测试卷(物理)试卷答案试卷答案
以下是该试卷的部分内容或者是答案亦或者啥也没有
2022一2023学年度高三一轮复习周测卷（二十七）英语(考试时间40分钟，总分100分)一、阅读理解（共8小题；每小题5分，满分40分）阅读下列短文，从每题所给的A、B、C和D四个选项中，选出最佳选项
AThehistoryofmicrobiologybeginswithaDutchclothmakernamedAntonivanLeeuwenhoek,amanofnoformalscientificeducation.Inthelate1600s,Leeuwenhoek,inspiredbythemagnifyinglenses()heusedtoexaminecloth,builtsomeofthefirstmicroscopes.Hedevelopedatechniquetoimprovethequalityoftiny,roundedlenses,someofwhichcouldmagnifyanobjectupto270times.Afterremovingsomeplaque(frombetweenhisteethandexaminingitunderalens,Leeuwenhoekfoundtinytwistingcreatures,whichhecalled“animalcules'”.Hisobservations,whichhereportedtotheRoyalSocietyofLondon,areamongthefirstdescriptionsofmicrobes().Leeuwenhoekdiscoveredanentireuniverseinvisibletothehumaneye.Hefounddifferentmicrobesinsamplesofpondwater,rainwater,andhumanblood.Hegavethefirstdescriptionofredbloodcells,observedplanttissue,examinedmuscle,andinvestigatedthelifecycleofinsects.Nearlytwohundredyearslater,Leeuwenhoek'sdiscoveryofmicrobeshelpedFrenchchemistandbiologistLouisPasteurtodevelophis"theoryofdisease".Thisconceptsuggestedthatdiseaseoriginatesfromtinyorganismsattackingandweakeningthebody.Pasteur'stheorylaterhelpeddoctorstofightinfectiousdiseasesincludinganthrax,diphtheria,polio,smallpox,tetanus,andtyphoid.AllthesebreakthroughsweretheresultofLeeuwenhoek'soriginalwork.Leeuwenhoekdidnotforeseethislegacy.Ina1716letter,hedescribedhiscontributiontosciencethisway:"Mywork,whichI'vedoneforalongtime,wasnotpursuedinordertogainthepraiseInowenjoy,butchieflyfromastrongdesireforknowledge,whichInoticeresidesinmemorethaninmostothermen.Andtherefore,wheneverIfoundoutanythingremarkable,Ihavethoughtitmydutytoputdownmydiscoveryonpaper,sothatthescientificcommunitymightbeinformedthereof."·58·
10.现如今,清洁高效的天然气已走进千家万户,因此,安全使用天然气很重要.如表所示是空气中天然气含量指数与泄漏等级的划分.如图甲所示是某天然气监测仪的电路原理图,已知电源电压恒为3V,R0是阻值为5Ω的定值电阻,R为气敏电阻,其阻值与天然气含量指数的关系如图乙所示.下列说法正确的是()A.R的阻值随天然气含量指数的增大而增大B.天然气含量指数越大,电压表的示数越小C.当电压表示数为2V时,天然气泄漏等级为安全D.当天然气含量指数为50时,电压表示数为1.5V
4.宇宙中有大量天体和地球相类似,均绕其中心轴线自转,由于自转的影响,天体表面的重力加速度会随纬度的变化而有所不同。假设某天体表面两极处的重力加速度为x=1200560°=5&2.10²r=1&2WR=1&109g,其赤道处的重力加速度为45g,若把该关体视为质量分布均匀的球体,则在北纬60^处的物体随该天体自转的向心加速度大小为34A.15gB.110gC.310gD.35g1&503&
为了电压能从零开始调节,滑动变阻器应选用2(选填“^6R1”或"R2'');请在方框内设计最合理的电路图并完成图丁中的实物连线。
