[今日更新]江西省新余市2023-2024年度上学期初二第二次阶段性练习.物理试卷答案

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[今日更新]江西省新余市2023-2024年度上学期初二第二次阶段性练习.物理试卷答案试卷答案

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D.Peoplehaveeveryreasontobeworriedaboutthefuture.29.Whaoeseitrndenp?DailyouethaicohomiLoouB.Reminderthattheordhabeechnged.014g9tni,,人9iy止yC.Eventsthatpeoplecandoduringthepandemic.D.Thingsorpeoplethatcarrysymboliemeanings.30.Whatdoeshedoorininparagraph3?A.Cooperative.B.Pioneering.31..Whatisthemainpurposeofthetext?C.Independent.D.Adventurous.了2.0部09游小增，小它A.Toexpreswisdomnedfromprevioxperiene..tg是，文fB.Togivepeoplesometipsonhowtohandleacrisis.C.Todeliveranupliftingmesageoverthepandemic,D.Toencouragepeopletoenjoythegreatoutdoore.e9eo功DFormostofourhistory,humanshavebeenshort,astudyhasfound.Untilaround150yearsago,fewpeoplegrewtallerthan170centimetres.ChristianeSchefflerattheUniversityofPotsdamandMichaelHermanusseninAltenhofhavespentseveralyearsstudyingtheheightofpeoplefromawiderangeofpopulations.Intheirlatest731Ypaper,theycombinedanexistingdataofmorethan6000prehistorichumanskeletonswithmultiplestudiesofmorerecenthistoricalpopulationsfromEuropeandtheUS.Theyalsoincludedtheirowndataon1666present-dayschoolchildrenfromIndonesia.Intheprehistoricpopulations,themaximumheightformenwas165to170centimetres,whilewomentoppedoutat160cm.Today,meninEnglandhaveanaverageheightofaround175cm,whileforwomenitisabout162cm.Butthereissignificantvariationbetweenmoderncountries.TheIndonesianschoolchildreninthestudywereshorterthansimilarlyagedchildrenfromtheUS,despitebeingwell-nourished.SchefflerandHermanussenarguethatheightcanbeasignalofdominance(显赫地位)，soimsocietieswhereitispossibletomoveupthroughthesocialclasses,evolutionfavoursindividualswhoreachagreaterheight.SubramanianatHarvardUniversityisn'tconvincedbythepair'sinterpretation.Histeampreviouslyshowedthatthebestpredictorofachild'sheightistheheightoftheirparents.Thissuggeststhattheinuenceoftherfactorsuchassoamobility,islimitedAfterassingy163,0childrenlivingin55wndd-no,Subramanian'teamfoundtha42.9erhadpfng(阻a碍发育）rtherphysicalindicatorofhfact.Thisimpliesthereisaloatofhidhenmalnmuiritionhaldoesnineealiselfthroughsninag.Asontebylookingatheirdehtf02116Ti.Subramanian.高三英试·第6页（共10页）

12.(3分)中国高铁运营里程突破4.2万公里,稳居世界第一,高速铁路的输电线,无论冬、夏都绷得直直的,如图甲采用坠砣牵引以保障列车电极与输电线的良好接触,图乙为输电线的牵引装置工作原理图,其中定滑轮可以小(选填“改变力的方向”或“省力”),图乙中为定滑轮(选填“A”或“B”)。钢绳通过滑轮组悬挂总重40000N的坠砣,不计滑轮和钢绳自重、摩擦,输电线P端受到的拉力大小为

3.如图所示,两个滑梯高度相等,如果小阳分别从左侧直梯和右侧弧形滑梯上端滑到地面,所t1t2,用时间分别为t和t小阳所受重力做功分别为W,和W,,重力的功率分别为P和P,,已W1W2,知t1<t2,则下列说法正确的是P1P2,()

4.体育课上,某同学跳起投篮,篮球脱手后斜向上飞出,如图所示。篮球在上升过程中θ速度方向与水平方向的夹角θ的正切值为tanθ,不计空气阻力,关于tanθ与篮球运tanθ,t动时间t的关系,下列图象可能正确的是