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真题密卷 2024-2025学年度单元过关检测(四)4-(物理)试卷答案试卷答案

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Fromtheageoffive,AlisonMbekeani,nowinDurhamUniversityforherPhD,dreamedofbecomingascientist.Butbecomingamothertotwochildrenputabrakeonhercareer.Shedoesnotexpecttoreturtothelabuntilherchildrenare16.Dr.Mbekeaniisnotalone.Onesurveyin2019foundthatchild-careresponsibilitiesled2fmherwithachildunder14toreducetheirworkinghourcomparedwithjust5%offathers.Inanidealworld,thegovernmentwouldnothavetoworryaboutanyofthis.Basedontheirpreferences,parentswouldmakeajudgmentoverwhethertooutsource(child-careorkeepitin-house.Thequestionforpolicymakersiswhetherparentalbehaviorreflectsactualpreferencesoritisdrivenbyconstraints()Constraintsareanissue.Threeinfivenonworkingmotherssaythattheywouldprefertowork,giventherightchild-care.Familieshadtoforkoutanaverageof260aweekin2021for50hoursofnurserycareforachildundertwo.Atenthofhouseholdswithachildunderfivereportdifficultymeetingsuchcosts.Aswellasprice,availabilityisaproblem.Just68%oflocalauthoritiesinEnglandreporthavingenoughchild-careprovisiontoserveparentswhoworkfulltime.Besideschild-care,thebenefitsthatcouldflowfromeveningoutthegender)imbalanceinchild-carecouldalsobeprettylarge.Onerecentstudyestimatedthegainsfromfflingmenandwomenaccordingtoability,pullingproductivewomenintoworkandkickingunproductivemenout.Astonishingly,itwascalculatedthatBritain'saverageoutputperworkercouldbeasmuchas30%higher.Cheaperchild-careandgender-balancedresponsibilityinitarewaysouttohelpmumsintowork,butpolicieswouldneedtobedesignedtotargetreallyconstrainedparents.However,expertsalsoaddthatgivingchildrenthebeststartinlifemeansshorter,structureddaysfullofinteraction.28.WhyisthestoryofAlisonmentioned?A.Toconfirmanidea.B.Todeveloptheplot.C.Todrawaconclusion.D.Tointroducethetopic.29.Whatisthegovernment'skeyfocusaboutchild-careproblem?A.Theinfluenceofparents'finaldecision.B.Thedifferenceofchildren'spreference.C.ThebalanceofresponsibilitytodohouseworkD.Theconsistencyofparentalbehaviorandactualliking.高三大联考·英语第6页（共12页）

真题密卷 2024-2025学年度单元过关检测(四)4-(物理)试卷答案第一部分

如图所听示,这是恒山新旅游索道,全长约1700m,上下高度差约70质量为m,全程最快只需7分40秒便可到站,被誉为“三晋第一索”。单个缆车质量为为140kg,每位乘客的平均为60kg单个缆车满载6人,缆车与索道的接触面积为0.0025m^2。若单个缆车满载时以最快的速度从索道最高处运行到最低处,g取10N/kg。请你计10N/kg。留1位小数):。请你计算(结果保你计(1)缆车通过索道的速度;v=00&0(2)索道上挂缆车处的钢索承受的压强;(3)缆车和人所受总重力做的功

真题密卷 2024-2025学年度单元过关检测(四)4-(物理)试卷答案第二部分（待更新）

8.用同一单缝衍射装置做a、b两种单色光的单缝衍射实验,获得的条纹分别如图甲、乙所示。下列说法正确的是甲乙A.a光的波长比b光的波长大B.a光在水中的传播速度大于b光在水中的传播速度C.若用同一双缝干涉装置做双缝干涉实验,得到a光的条纹间距小于b光的条纹间距aD.若用b光照射钾金属能发生光电效应,则用a光照射也一定能发生光电效应