[今日更新]河南省2023-2024学年度第一学期九年级阶段性测试卷（3/4）.物理试卷答案

[今日更新]河南省2023-2024学年度第一学期九年级阶段性测试卷（3/4）.物理试卷答案试卷答案,我们目前收集并整理关于[今日更新]河南省2023-2024学年度第一学期九年级阶段性测试卷（3/4）.物理试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)

[今日更新]河南省2023-2024学年度第一学期九年级阶段性测试卷（3/4）.物理试卷答案试卷答案

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0Acomputerprogrammecanidentifybreastcancerfromroutinescanswithgreateraccuracythanhumanexperts.Researcherssaidtheyhopedthiscouldproveabreakthroughinthefightagainsttheglobalkiller.Breastcancerisoneofthemostcommoncancersinwomenallovertheworld,withmorethan2millionnewdiagnoseslastyearalone.Whetherbreastcancerissevereiscloselyrelatedtothetimeofdiagnosis.Therefore,theregularexaminationisvitalindetectingtheearliestsignsofthediseaseinpatientswhoshownoobvioussymptoms.InBritain,womenover50areadvisedtogetamammogram(乳房X光检查)everythreeyears,theresultsofwhichareinterpretedbytwoindependentexpertsinordertoreduceerrorsindiagnosis.Butinterpretingthescansleavesroomforerror,andasmallpercentageofallmammogramseitherreturnafalsepositive-misdiagnosingahealthypatientashavingcancerorfalsenegative-missingthediseaseasitspreads.NowresearchersatGoogleHealthhavetrainedanartificialintelligencemodeltodetectcancerinbreastscansfromthousandsofwomeninBritainandtheUnitedStates.Theimageshadalreadybeenreviewedbydoctorsinreallifebutunlikeinaclinicalsetting,themachinehadnopatienthistorytoinformitsdiagnoses.TheteamfoundthattheirAImodelcouldpredictbreastcancerfromthescanswithasimilaraccuracyleveltoexpertradiographers,whoaretrainedtotakeX-rays.Further,theAIshowedareductioninthepercentageofcaseswherecancerwasincorrectlyidentified-5.7percentintheUSand1.2percentinBritain,respectively.Italsoreducedthepercentageofmisseddiagnosesby9.4percentamongUSpatientsandby2.7percentinBritain."Theearlieryouidentifyabreastcancer,thebetteritisforthepatient."DominicKing,UKleadingscientistatGoogleHealth,toldAFP."Wethinkaboutthistechnologyinawaythatsupportsandenablesanexpert,orapatientultimately,togetthebestoutcomefromwhateverdiagnostics(诊断法)hey'vehad,.”32.Whatdowelearnaboutbreastcancer?A.IthasbecomethetopkillerofallcancersB.Itistypicalfortwodoctorstoanalyzethescanstogether.C.Theprogramhassucceededinthefightagainstbreastcancer.D.Itsseriousnessisstronglyconnectedwiththetimeofitsdiagnosis.33.WhichofthefollowingisNOTanadvantageoftheartificialintelligencemodel?A.Alowerpercentageofmisseddiagnoses.B.Asmallerpercentageofmistakenlyidentifiedcases.C.Noerrorsinmammogramsbeingreturnedinafalseresult.D.Norequirementforpatienthistorytoinformitsdiagnoses.英语试题第5页（共12页）

14.(12分)高空抛物是一种不文明的行为,会带来很大的社会危害.某消防员为了测试高空抛物的危害,将一个物体从某高楼的楼顶自由释放,物体(可视为质点)落地速度的太小为60m/s,,落地后不反弹,不计空气阻力,g取10m/s^2,求:(1)楼顶的高度;(2)最后1s物体下落的高度;(3)12s内物体的平均速率.

8.蹦极是一项深受年轻人喜爱的极限运动。如图所示,某人身系弹性绳自高空P点自由下落,a点是弹性绳为原长时人的位置,b点是人静止悬挂时的平衡位置,c点是人所能到达的最低点,不计空气阻力,人可视为质点,弹性绳质量不计且满足胡克定律,则人在第一次下降到最低点的过程中,下列说法正确的是A.人的机械能守恒B.人落至a点时的动能最大C.从b点到c点人处于超重状态以人D.弹性绳具有的最大弹性势能大于人的最大动能+bAD

13.在竖直平面内的M点将小球以大小为v0的速度水平向左射出,小球始终受到向右、与重力大小相等的水平外力F的作用,不计空气阻力,重力加速度大小为g。以小球射出瞬间为计时起点,则A.小球做匀变速直线运动B.经过时间v02g,小球的动能最小C.经过时间;v02g,小球机械能减小最多D.在时间内,合力做功为零